核壳纳米粉体制备Y₂O₃-MgO复相陶瓷 增强出版

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"first-author" ], "bio": [ { "lang": "en", "text": [ "江宏涛(1995-)，男，浙江平湖人，硕士研究生，2018年于南京工业大学获得学士学位，主要从事红外窗口材料的制备与研究。E-mail: jianghongtao@nimte.ac.cn" ], "graphic": [ { "print": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352193&type=", "small": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352195&type=", "big": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352197&type=" } ], "data": [ [ { "name": "text", "data": "江宏涛" }, { "name": "text", "data": "(1995-)，男，浙江平湖人，硕士研究生，2018年于南京工业大学获得学士学位，主要从事红外窗口材料的制备与研究。E-mail: " }, { "name": "text", "data": "jianghongtao@nimte.ac.cn" } ] ] } ], "email": "jianghongtao@nimte.ac.cn", "deceased": false }, { "name": [ { "lang": "en", "surname": "QIN", "givenname": "Hai-ming", "namestyle": "eastern", "prefix": "" }, { "lang": "zh", "surname": "秦", "givenname": "海明", "namestyle": "eastern", "prefix": "" } ], "stringName": [], "aff": [ { "rid": "aff2", "text": "2" }, { "rid": "aff3", "text": "3" } ], "role": [], "deceased": false }, { "name": [ { "lang": "en", "surname": "FENG", "givenname": "Shao-wei", "namestyle": "eastern", "prefix": "" }, { "lang": "zh", "surname": "冯", "givenname": "少尉", "namestyle": "eastern", "prefix": "" } ], "stringName": [], "aff": [ { "rid": "aff3", "text": "3" }, { "rid": "aff4", "text": "4" } ], "role": [ "corresp" ], "corresp": [ { "rid": "cor1", "lang": "en", "text": "* Corresponding Authors, E-mail: swfeng@ipe.ac.cn", "data": [ { "name": "text", "data": "* Corresponding Authors, E-mail: swfeng@ipe.ac.cn" } ] } ], "bio": [ { "lang": "en", "text": [ "冯少尉(1990-)，男，山东泰安人，博士研究生，2018年于上海大学获得硕士学位，主要从事透明光功能陶瓷的研究。E-mail: swfeng@ipe.ac.cn" ], "graphic": [ { "print": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352199&type=", "small": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352202&type=", "big": 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"School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315201, China", "data": [ { "name": "text", "data": "School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315201, China" } ] }, { "lang": "zh", "label": "1", "text": "宁波大学　材料科学与化学工程学院，浙江 　 宁波 　 315201", "data": [ { "name": "text", "data": "宁波大学　材料科学与化学工程学院，浙江 　 宁波 　 315201" } ] } ] }, { "id": "aff2", "intro": [ { "lang": "en", "label": "2", "text": "Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China", "data": [ { "name": "text", "data": "Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China" } ] }, { "lang": "zh", "label": "2", "text": "中国科学院　宁波材料技术与工程研究所，浙江 　 宁波 　 315201", "data": [ { "name": "text", "data": "中国科学院　宁波材料技术与工程研究所，浙江 　 宁波 　 315201" } ] } ] }, { "id": "aff3", "intro": [ { "lang": "en", "label": "3", "text": "University of Chinese Academy of Sciences, Beijing 100049, China", "data": [ { "name": "text", "data": "University of Chinese Academy of Sciences, Beijing 100049, China" } ] }, { "lang": "zh", "label": "3", "text": "中国科学院大学，北京 　 100049", "data": [ { "name": "text", "data": "中国科学院大学，北京 　 100049" } ] } ] }, { "id": "aff4", "intro": [ { "lang": "en", "label": "4", "text": "National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China", "data": [ { "name": "text", "data": "National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China" } ] }, { "lang": "zh", "label": "4", "text": "中国科学院　过程工程研究所，湿法冶金清洁生产技术国家工程实验室，中科院绿色过程与工程重点实验室，北京 　 100190", "data": [ { "name": "text", "data": "中国科学院　过程工程研究所，湿法冶金清洁生产技术国家工程实验室，中科院绿色过程与工程重点实验室，北京 　 100190" } ] } ] } ] }, "abstracts": [ { "lang": "en", "data": [ { "name": "p", "data": [ { "name": "text", "data": "Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO composite nano-ceramics are regarded as a significant candidate of infrared transparent ceramics on account of excellent optical and mechanical properties. Nevertheless, a huge challenge remains regarding the critical optical scattering and needless absorption in the near- and mid-infrared bands, which hinders its applications in extreme harsh environments. In present work, Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO core-shell structure nano-powders were prepared " }, { "name": "italic", "data": [ { "name": "text", "data": "via" } ] }, { "name": "text", "data": " urea precipitation method before that Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO composite nano-ceramics were prepared under spark plasma sintering. Thermogravimetric and differential scanning calorimetry(TG/DSC), X-ray diffraction and scanning electron microscope were performed to analyze as prepared core-shell structure nano-powders and composite nano-ceramics. The size of Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO core-shell structure nano-powders is about 250 nm, and average grain size of the prepared ceramics is approximately 360 nm. The transmittance is 57% at 6 μm, and the Vickers hardness is 820 HV. The powder synthesis method accomplished in present work offers a novel solution for composite nano-ceramics, which easily regulate particle size and proportion of different components." } ] } ] }, { "lang": "zh", "data": [ { "name": "p", "data": [ { "name": "text", "data": "由于优异的光学和机械性能，Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO复相纳米陶瓷被认为是红外透明陶瓷的重要候选材料. 尽管如此，在近红外和中红外波段严重的光散射和不必要的吸收方面仍然存在巨大的挑战，这阻碍了该材料在极端恶劣环境中的应用. 在目前的工作中，先通过尿素沉淀法制备了Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO核壳结构纳米粉体，然后在放电等离子体烧结下制备了Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO复相纳米陶瓷. 通过热重和差示扫描量热法(TG/DSC)、X射线衍射和扫描电子显微镜分析了核壳结构纳米粉及复相纳米陶瓷. Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO核壳结构纳米粉体的尺寸约为250 nm，并且制备的陶瓷的平均晶粒尺寸约为360 nm. 透过率在6 μm处为57%，维氏硬度为820 HV. 粉末合成方法为复相纳米陶瓷提供了一种新颖的解决方案，可以轻松调节粒径和不同组分的比例." } ] } ] } ], "keyword": [ { "lang": "en", "data": [ [ { "name": "text", "data": "Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO composite nano-ceramics" } ], [ { "name": "text", "data": "core-shell structure nano-powder" } ], [ { "name": "text", "data": "urea precipitation method" } ], [ { "name": "text", "data": "spark plasma sintering" } ] ] }, { "lang": "zh", "data": [ [ { "name": "text", "data": "Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO复相纳米陶瓷" } ], [ { "name": "text", "data": "核壳结构纳米粉体" } ], [ { "name": "text", "data": "尿素沉淀法" } ], [ { "name": "text", "data": "放电等离子烧结" } ] ] } ], "highlights": [], "body": [ { "name": "sec", "data": [ { "name": "sectitle", "data": { "title": [ { "name": "text", "data": "1　Introduction" } ], "level": "1", "id": "s1" } }, { "name": "p", "data": [ { "name": "text", "data": "In recent years, infrared window materials are brought into focus due to widely used in infrared tracking, identification, search, guidance, navigation, and thermal imaging" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "blockXref", "data": { "data": [ { "name": "xref", "data": { "text": "1", "type": "bibr", "rid": "R1", "data": [ { "name": "text", "data": "1" } ] } }, { "name": "text", "data": "-" }, { "name": "xref", "data": { "text": "7", "type": "bibr", "rid": "R7", "data": [ { "name": "text", "data": "7" } ] } } ], "rid": [ "R1", "R2", "R3", "R4", "R5", "R6", "R7" ], "text": "1-7", "type": "bibr" } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": ". In order to cope with various application environments, the performance of infrared window materials need to meet the following requirements: infrared transparency, high mechanical strength, high thermal conductivity, and resistance to thermal shock and erosion" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "blockXref", "data": { "data": [ { "name": "xref", "data": { "text": "5", "type": "bibr", "rid": "R5", "data": [ { "name": "text", "data": "5" } ] } }, { "name": "text", "data": "-" }, { "name": "xref", "data": { "text": "6", "type": "bibr", "rid": "R6", "data": [ { "name": "text", "data": "6" } ] } } ], "rid": [ "R5", "R6" ], "text": "5-6", "type": "bibr" } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": ". However, it is not realistic to improve the operational properties of infrared materials(ZnS, Al" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": " and MgAl" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "4" } ] }, { "name": "text", "data": ") that have been widely used in extreme environments and under severe loads, such as aerospace applications" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "7", "type": "bibr", "rid": "R7", "data": [ { "name": "text", "data": "7" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": ". Recently, progress of the composite ceramic as a competitive candidate in this area brings new driving power." } ] }, { "name": "p", "data": [ { "name": "text", "data": "Among all nano-composite ceramics, the Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO nano-composite ceramics are presentative infrared transparent ceramic, since the Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO nano-composite ceramics process outstanding thermal and mechanical properties for extreme environments" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "blockXref", "data": { "data": [ { "name": "xref", "data": { "text": "8", "type": "bibr", "rid": "R8", "data": [ { "name": "text", "data": "8" } ] } }, { "name": "text", "data": "-" }, { "name": "xref", "data": { "text": "10", "type": "bibr", "rid": "R10", "data": [ { "name": "text", "data": "10" } ] } } ], "rid": [ "R8", "R9", "R10" ], "text": "8-10", "type": "bibr" } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": ". The most commonly approach to sintering Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO nano-composite ceramics is the spark plasma sintering(SPS). SPS regarded as a rapid solidification sintering method is an especially efficient technique, through which the sintering time can be massively decreased owing to the rapid heating rate at a speed higher than 100 ℃/min compared with conventional sintering methods. For the pressureless sintering, the higher sintering temperature and the longer sintering time lead to dramatically grain growth, particularly in the final period of the densification. For another, SPS enhances the driving force of sintering by dynamically activating plastic deformation and diffusion processes, which is efficacious to restrict the grain growth under a lower sintering temperature and high intensity of pressure. In 2010, Jiang " }, { "name": "italic", "data": [ { "name": "text", "data": "et al" } ] }, { "name": "text", "data": "." }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "11", "type": "bibr", "rid": "R11", "data": [ { "name": "text", "data": "11" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": " prepared Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO nano-composite ceramics with the grain size less than 100 nm by SPS sintering under a load of 80 MPa. Liu " }, { "name": "italic", "data": [ { "name": "text", "data": "et al" } ] }, { "name": "text", "data": "." }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "12", "type": "bibr", "rid": "R12", "data": [ { "name": "text", "data": "12" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": " used SPS to sinter the powders after ultrasonic horn treatment to prepare the Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO nano-composite ceramics at 50 MPa. Huang " }, { "name": "italic", "data": [ { "name": "text", "data": "et al" } ] }, { "name": "text", "data": "." }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "13", "type": "bibr", "rid": "R13", "data": [ { "name": "text", "data": "13" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": " prepared the Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO nano-composite ceramics with a grain size of 100-200 nm through SPS sintering with 100 MPa. Then, Xu " }, { "name": "italic", "data": [ { "name": "text", "data": "et al" } ] }, { "name": "text", "data": "." }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "14", "type": "bibr", "rid": "R14", "data": [ { "name": "text", "data": "14" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": " prepared the Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO nano-composite ceramics with a grain size of 100-300 nm through SPS sintering under 50 MPa, which got the nano-powder through the esterification sol-gel route. Recently, Safronova" }, { "name": "italic", "data": [ { "name": "text", "data": "et al" } ] }, { "name": "text", "data": "." }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "15", "type": "bibr", "rid": "R15", "data": [ { "name": "text", "data": "15" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": " explored the influence of temperature on the Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO nano-composite ceramics during SPS sintering. At the same time, Liu " }, { "name": "italic", "data": [ { "name": "text", "data": "et al" } ] }, { "name": "text", "data": "." }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "16", "type": "bibr", "rid": "R16", "data": [ { "name": "text", "data": "16" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": " and Ma " }, { "name": "italic", "data": [ { "name": "text", "data": "et al" } ] }, { "name": "text", "data": "." }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "17", "type": "bibr", "rid": "R17", "data": [ { "name": "text", "data": "17" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": " independently explored the influence of pressure and LiF sintering aid on grain growth of Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO ceramics." } ] }, { "name": "p", "data": [ { "name": "text", "data": "For obtaining Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO nano-composite ceramics, the preparation method of Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO nano-powders is as important as the sintering process. The high sinterability and homogeneity of nano-powders are critical parameters for obtaining the smaller grain-sized composite ceramics with high transmittance in the infrared band. So far, the preparation methods of Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO nano-powders mainly including spray pyrolysis" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "xref", "data": { "text": "11", "type": "bibr", "rid": "R11", "data": [ { "name": "text", "data": "11" } ] } }, { "name": "text", "data": "," }, { "name": "xref", "data": { "text": "18", "type": "bibr", "rid": "R18", "data": [ { "name": "text", "data": "18" } ] } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": ", sol-gel method" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "blockXref", "data": { "data": [ { "name": "xref", "data": { "text": "19", "type": "bibr", "rid": "R19", "data": [ { "name": "text", "data": "19" } ] } }, { "name": "text", "data": "-" }, { "name": "xref", "data": { "text": "24", "type": "bibr", "rid": "R24", "data": [ { "name": "text", "data": "24" } ] } } ], "rid": [ "R19", "R20", "R21", "R22", "R23", "R24" ], "text": "19-24", "type": "bibr" } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": ", glycine-nitrate process" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "blockXref", "data": { "data": [ { "name": "xref", "data": { "text": "25", "type": "bibr", "rid": "R25", "data": [ { "name": "text", "data": "25" } ] } }, { "name": "text", "data": "-" }, { "name": "xref", "data": { "text": "26", "type": "bibr", "rid": "R26", "data": [ { "name": "text", "data": "26" } ] } } ], "rid": [ "R25", "R26" ], "text": "25-26", "type": "bibr" } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": " and sol-gel combustion method" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "blockXref", "data": { "data": [ { "name": "xref", "data": { "text": "27", "type": "bibr", "rid": "R27", "data": [ { "name": "text", "data": "27" } ] } }, { "name": "text", "data": "-" }, { "name": "xref", "data": { "text": "30", "type": "bibr", "rid": "R30", "data": [ { "name": "text", "data": "30" } ] } } ], "rid": [ "R27", "R28", "R29", "R30" ], "text": "27-30", "type": "bibr" } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": " were systematically studied. The above methods can produce nano-size Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": " and MgO powders. However, these powder preparation methods still exist some problems, such as relatively expensive raw materials, long powder preparation cycles, relatively high equipment requirements and uncontrollable reaction processes. Urea precipitation is a kind of powder preparation method with simple operation, short reaction period, uniform system, and controllable precipitation process" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "blockXref", "data": { "data": [ { "name": "xref", "data": { "text": "31", "type": "bibr", "rid": "R31", "data": [ { "name": "text", "data": "31" } ] } }, { "name": "text", "data": "-" }, { "name": "xref", "data": { "text": "32", "type": "bibr", "rid": "R32", "data": [ { "name": "text", "data": "32" } ] } } ], "rid": [ "R31", "R32" ], "text": "31-32", "type": "bibr" } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": ". Urea is an easily available and relatively environmentally friendly precipitant. In the reaction process, urea decomposes slowly until the solution rises to 80-90 ℃, and a large amount of urea begins to decompose, producing OH" }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": " and C" }, { "name": "inlineformula", "data": [ { "name": "math", "data": { "graphicsData": { "print": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352219&type=", "small": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352224&type=", "big": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352222&type=" } } } ] }, { "name": "text", "data": ", and forming a great amount of precipitation within a short period" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "blockXref", "data": { "data": [ { "name": "xref", "data": { "text": "33", "type": "bibr", "rid": "R33", "data": [ { "name": "text", "data": "33" } ] } }, { "name": "text", "data": "-" }, { "name": "xref", "data": { "text": "34", "type": "bibr", "rid": "R34", "data": [ { "name": "text", "data": "34" } ] } } ], "rid": [ "R33", "R34" ], "text": "33-34", "type": "bibr" } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": ". However, the precipitation variables of dual cations are complex and difficult to control, so the introduction of nano-particles as cores can induce the precipitation of precursors onto the surface of nano-particles through heterogeneous phase formation to form a core-shell structure, thus simplifying the variables in the process of preparing nano-composite powders by urea precipitation" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "blockXref", "data": { "data": [ { "name": "xref", "data": { "text": "35", "type": "bibr", "rid": "R35", "data": [ { "name": "text", "data": "35" } ] } }, { "name": "text", "data": "-" }, { "name": "xref", "data": { "text": "38", "type": "bibr", "rid": "R38", "data": [ { "name": "text", "data": "38" } ] } } ], "rid": [ "R35", "R36", "R37", "R38" ], "text": "35-38", "type": "bibr" } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": ". The mechanism of the self-assembled core-shell precursors can be divided into two stages. First, as urea hydrolysis began, the precipitant groups of OH" }, { "name": "sup", "data": [ { "name": "text", "data": "-" } ] }, { "name": "text", "data": ", C" }, { "name": "inlineformula", "data": [ { "name": "math", "data": { "graphicsData": { "print": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352226&type=", "small": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352232&type=", "big": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352228&type=" } } } ] }, { "name": "text", "data": " and HC" }, { "name": "inlineformula", "data": [ { "name": "math", "data": { "graphicsData": { "print": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352235&type=", "small": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352246&type=", "big": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352241&type=" } } } ] }, { "name": "text", "data": " were formed and modified the surface of the nano-particle. The Y-compound was precoated on the surface of nano-particles, driven by electrostatic attraction. Secondly, the assembly of the tiny Y-compound particles is formed in the burst nucleation process onto nano-particle surface, mainly driven by its high surface energy" }, { "name": "sup", "data": [ { "name": "text", "data": "[" }, { "name": "blockXref", "data": { "data": [ { "name": "xref", "data": { "text": "39", "type": "bibr", "rid": "R39", "data": [ { "name": "text", "data": "39" } ] } }, { "name": "text", "data": "-" }, { "name": "xref", "data": { "text": "42", "type": "bibr", "rid": "R42", "data": [ { "name": "text", "data": "42" } ] } } ], "rid": [ "R39", "R40", "R41", "R42" ], "text": "39-42", "type": "bibr" } }, { "name": "text", "data": "]" } ] }, { "name": "text", "data": ". Meanwhile, the size of the powder is bound by the core-shell structure, so that the grains do not grow excessively during the sintering process." } ] }, { "name": "p", "data": [ { "name": "text", "data": "In present work, the homogenous Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO core-shell structure nano-powders were prepared through urea precipitation approach. In order to obtain high sinterability powders, the calcination temperature, powder morphology and size of Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO core-shell structure nano-powders were studied compared with that of single-phase Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": ". Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO composite nano-ceramics were sintered by SPS using core-shell powders as the beginning powders. This core-shell nano-powders preparation method and SPS procedure are simple and inexpensive, which provide a novel way to fabricate Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO composite nano-ceramics." } ] } ] }, { "name": "sec", "data": [ { "name": "sectitle", "data": { "title": [ { "name": "text", "data": "2　Experimental and Characterizations" } ], "level": "1", "id": "s2" } }, { "name": "p", "data": [ { "name": "text", "data": "Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO core-shell structure nano-powders were prepared by urea precipitation. The raw materials were Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "(5N), nitric acid(AR), urea(99%), and MgO(99.9%, 50 nm). Firstly, 0.015 mol Y(NO" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": ")" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": " solution was prepared by dissolving 0.007 5 mol Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": " in a certain number of HNO" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": ". Next, Y(NO" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": ")" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": " solution was added together with 0.5 mol urea into a three-necked flask of 2 000 mL. Then, MgO was weighted with a volume ratio of 1∶1 to Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": " into the container through stirring and dispersing sufficiently. After that, MgO was transferred to the solution in the three-necked flask. Currently, there were about 1 300 mL of solution in the three-necked flask. Finally, the three-necked flask was placed in a heating mantle to heat the solution temperature from room temperature to (85±1) ℃ in about 40 min. At the same time, an electric stirrer was used to stir at a rate of 500 r/min. When the solution was obviously turbid, the reaction was maintained in this state for 2 h. After two hours, the resulting suspension was obtained by suction filtration, and then the suspension was placed in an oven and dried at 80 ℃ for 24 h. The dried precursors were put into the muff furnace and calcined at the selected temperature for 1 h, after which 0.25% LiF(99%) was added and the powders were ground, and then screened with a 140-mesh sieve." } ] }, { "name": "p", "data": [ { "name": "text", "data": "Transparent Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": " ceramics powders were also prepared by urea precipitation method, and then ground and screened with 140 mesh, and then compressed into " }, { "name": "italic", "data": [ { "name": "text", "data": "φ" } ] }, { "name": "text", "data": "10 discs by a powder tablet machine. The ceramic tablets were compacted at 200 MPa using a cold isostatic press. The sintering method was vacuum sintering, the temperature was 1 750 ℃, and the holding time was 4 h." } ] }, { "name": "p", "data": [ { "name": "text", "data": "The powders obtained above were sintered into ceramics through SPS(LABOX-1575, SinterL and Inc., Japan). The powder samples loaded into the graphite mold were heated from room temperature to a pre-set temperature(1 200 ℃) at the heating rate of 100 ℃/min under vacuum(10 Pa) and the dwell time was 8 min with the pressure of 50 MPa. The sintered Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO composite nano-ceramics were annealed in the air at 1 000 ℃ for 15 h to eliminate oxygen vacancies, carbon and residual stress. When measuring infrared transmittance, the sample is polished on both sides to a thickness of~0.9 mm." } ] }, { "name": "p", "data": [ { "name": "text", "data": "XRD patterns were measured by a Bruker D8 X-ray diffractometer with Cu Kα radiation(" }, { "name": "italic", "data": [ { "name": "text", "data": "λ" } ] }, { "name": "text", "data": "=0.154 056 nm) at 40 kV and 40 mA. Thermal analysis of the precursors was measured by thermogravimetric/differential scanning calorimetry(TG/DSC, STA 449F3, NETZSCH, Germany) at a heating rate of 10 K/min in air. A thermal field emission scanning electron microscope(TFE-SEM, Thermo Scientific Verios G4 UC) was used to observe the microscopic morphology of the powders. The particle size distributions of the powders were measured by Laser particle size analyzer(HELOS-OASIS, Sympatec GmbH, Germany). The grain and grain boundary morphology of the ceramic were measured by a field emission scanning electron microscope(FE-SEM, Hitachi S4800, Japan). The transmittance in the wavelength range of" }, { "name": "italic", "data": [ { "name": "text", "data": "λ" } ] }, { "name": "text", "data": "=0.25-2.5 μm was conducted by using a spectrometer(Lambda 950, Perkin Elmer Co., USA). Fourier transform infrared spectroscopy(NICOLET 6700, Thermo Co, USA) was used to measure the transmittance of the mirror polished samples at a range of 2.5-10 μm. An image analysis microhardness tester(HV-1000/S, SIOMM, Shanghai) was used to carry out a 10 s, 100 N load test to obtain the Vickers hardness result." } ] } ] }, { "name": "sec", "data": [ { "name": "sectitle", "data": { "title": [ { "name": "text", "data": "3　Results and Discussion" } ], "level": "1", "id": "s3" } }, { "name": "p", "data": [ { "name": "xref", "data": { "text": "Fig.1", "type": "fig", "rid": "F1", "data": [ { "name": "text", "data": "Fig.1" } ] } }, { "name": "text", "data": " shows TG/DSC curves of the Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO core-shell structure nano-powder precursors. In the process from room temperature to 870 ℃, the total mass loss is 34.1%, which can be divided into four periods. The first period is from room temperature to 185.7 ℃, with a mass loss of 8.0%, and an endothermic peak at 137.5 ℃ is due to the evaporation of absorbed water and the release of bound water. The mass loss in the second period is 13.9%, which occurs in the temperature range between 185.7 and 422.6 ℃. The exothermic peaks at 226 ℃ and 286 ℃ are mainly caused by the decomposition and oxidation of N" }, { "name": "inlineformula", "data": [ { "name": "math", "data": { "graphicsData": { "print": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352252&type=", "small": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352262&type=", "big": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352257&type=" } } } ] }, { "name": "text", "data": " ions. The third period is 422.6 ℃ to 598.8 ℃, and its mass loss is 8.4%. Among them, there is an endothermic peak at 492.8 ℃ and 568 ℃, which is caused by the decomposition of hydroxides and carbonates. The 3.8% mass loss occurs in the last period, and there is an exothermic peak at 653.3 ℃, which is related to the crystallization of the Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": " crystals. The results of TG-DSC curves indicate Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO core-shell structure nano-powders can be obtained at 750 ℃." } ] }, { "name": "fig", "data": { "id": "F1", "caption": [ { "lang": "en", "label": [ { "name": "text", "data": "Fig.1" } ], "title": [ { "name": "text", "data": "TG-DSC curves of the Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO core-shell structure nano-powder precursors" } ] } ], "subcaption": [], "note": [], "graphics": [ { "print": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352267&type=", "small": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352275&type=", "big": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352271&type=" } ] } }, { "name": "p", "data": [ { "name": "xref", "data": { "text": "Fig.2", "type": "fig", "rid": "F2", "data": [ { "name": "text", "data": "Fig.2" } ] } }, { "name": "text", "data": " shows XRD patterns of MgO nano-powders, Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": " nano-powder precursors, Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO core-shell structure nano-powder precursors and Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO core-shell structure nano-powders calcined at different temperatures. Compared with Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": " nano-powder precursors, Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO core-shell structure nano-powder precursors appear weaker MgO peaks. The other peaks may be caused by the formation of the coating structure and some changes in the disordered structure of the outer layer. According to thermal analysis, the powders have reached its crystallization temperature at 650 ℃. After reaching 750 ℃, the powders have been completely crystallized, and no obvious heat absorption and exotherm were observed, and the quality almost no longer changes. As a result, 750 ℃ is the optimum calcination temperature for the powders. The XRD of core-shell structure nano-powders calcined at 650, 750, 850 ℃are consistent with that of Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": " and MgO, and there is no obvious change between them, except that the peak shape gradually becomes sharp with the increase of temperature, indicating that the powders have basically formed phase at 650 ℃. Therefore, the calcined temperature of Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO core-shell structure nano-powder precursors is higher about 100 ℃ than precursor crystallization temperature in order to remove possible traces of carbon- and nitrogen-containing compounds." } ] }, { "name": "fig", "data": { "id": "F2", "caption": [ { "lang": "en", "label": [ { "name": "text", "data": "Fig.2" } ], "title": [ { "name": "text", "data": "XRD patterns of MgO nano-powders, Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": " nano-powder precursors, Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO core-shell structure nano-powder precursors and Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO core-shell structure nano-powders calcined at different temperatures." } ] } ], "subcaption": [], "note": [], "graphics": [ { "print": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352278&type=", "small": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352284&type=", "big": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352281&type=" } ] } }, { "name": "p", "data": [ { "name": "xref", "data": { "text": "Fig.3", "type": "fig", "rid": "F3", "data": [ { "name": "text", "data": "Fig.3" } ] } }, { "name": "text", "data": " shows the micromorphology of MgO nano-powders, Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": " powders, Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO core-shell structure nano-powder precursors and Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO core-shell structure nano-powders. The powder size of MgO nano-powders in " }, { "name": "xref", "data": { "text": "Fig.3(a)", "type": "fig", "rid": "F3", "data": [ { "name": "text", "data": "Fig.3(a)" } ] } }, { "name": "text", "data": " is about 50 nm, and the powder morphology are relatively uniform. " }, { "name": "xref", "data": { "text": "Fig.3(b)", "type": "fig", "rid": "F3", "data": [ { "name": "text", "data": "Fig.3(b)" } ] } }, { "name": "text", "data": " shows the prepared Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": " powders by the urea precipitation method. The size of Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": " powders with good sphericity and good monodispersity is about 200-300 nm. The micrograph of Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO core-shell structure nano-powder precursors (" }, { "name": "xref", "data": { "text": "Fig.3(c)", "type": "fig", "rid": "F3", "data": [ { "name": "text", "data": "Fig.3(c)" } ] } }, { "name": "text", "data": ") is much more similar to that of MgO nano-powders due to the nucleation process starting on the surface of MgO nano-powders. As shown in " }, { "name": "xref", "data": { "text": "Fig.3(d)", "type": "fig", "rid": "F3", "data": [ { "name": "text", "data": "Fig.3(d)" } ] } }, { "name": "text", "data": ", Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO core-shell structure nano-powders with soft agglomeration are composed of microcrystals. Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO core-shell structure nano-powders exhibit a clear interface between core and shell, which indicates the MgO nano-powders as a core are successfully cladded with Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": " powders as a shell. The size distribution of all the powders is shown in " }, { "name": "xref", "data": { "text": "Fig.4", "type": "fig", "rid": "F4", "data": [ { "name": "text", "data": "Fig.4" } ] } }, { "name": "text", "data": ". Compared with the SEM images, the four kinds of powders have different degrees of agglomeration. " }, { "name": "xref", "data": { "text": "Fig.4(a)", "type": "fig", "rid": "F4", "data": [ { "name": "text", "data": "Fig.4(a)" } ] } }, { "name": "text", "data": " shows the particle size distribution of MgO nano-powders is around 600 nm, which is quite different from the SEM image. This is due to the small size of MgO nano-powders and large specific surface area, which is easy to form large agglomerated particles. According to " }, { "name": "xref", "data": { "text": "Fig.4(b)", "type": "fig", "rid": "F4", "data": [ { "name": "text", "data": "Fig.4(b)" } ] } }, { "name": "text", "data": ", the size of Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": " powders is mainly concentrated in 200-300 nm, which is more consistent with " }, { "name": "xref", "data": { "text": "Fig.3(b)", "type": "fig", "rid": "F3", "data": [ { "name": "text", "data": "Fig.3(b)" } ] } }, { "name": "text", "data": " image. Therefore, the larger particles are ascribed to slightly agglomerating of Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": " powders. " }, { "name": "xref", "data": { "text": "Fig.4(c)", "type": "fig", "rid": "F4", "data": [ { "name": "text", "data": "Fig.4(c)" } ] } }, { "name": "text", "data": " shows that the particle size distribution of Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO core-shell structure nano-powder precursors is mainly 100-300 nm. Since the precursors have not undergone crystallization after calcination, the particles have not grown. From " }, { "name": "xref", "data": { "text": "Fig.4(d)", "type": "fig", "rid": "F4", "data": [ { "name": "text", "data": "Fig.4(d)" } ] } }, { "name": "text", "data": ", the agglomeration of Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO core-shell structure nano-powders nearly disappear with uniform size distribution at about 250 nm. After calcined at low temperature, the inorganic acid ions are decomposed and core-shell structure powders did not happen growing up." }, { "name": "xref", "data": { "text": "Fig.5", "type": "fig", "rid": "F5", "data": [ { "name": "text", "data": "Fig.5" } ] } }, { "name": "text", "data": " shows the EDS mapping images of Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO core-shell structure nano-powders calcined at 750 ℃. As represented in " }, { "name": "xref", "data": { "text": "Fig.5", "type": "fig", "rid": "F5", "data": [ { "name": "text", "data": "Fig.5" } ] } }, { "name": "text", "data": ", Y, Mg and O elements are evenly distributed throughout Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO core-shell structure nano-powders. However, the content distribution of Y is denser than that of Mg due to Y distributing on the outer surface of core-shell structure." } ] }, { "name": "fig", "data": { "id": "F3", "caption": [ { "lang": "en", "label": [ { "name": "text", "data": "Fig.3" } ], "title": [ { "name": "text", "data": "SEM images of MgO nano-powders(a), Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": " powders(b), Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO core-shell structure nano-powder precursors(c), Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO core-shell structure nano-powders(d)." } ] } ], "subcaption": [], "note": [], "graphics": [ { "print": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352288&type=", "small": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352297&type=", "big": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352292&type=" } ] } }, { "name": "fig", "data": { "id": "F4", "caption": [ { "lang": "en", "label": [ { "name": "text", "data": "Fig.4" } ], "title": [ { "name": "text", "data": "Particle size distributions of MgO nano-powders(a), Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": " powders(b), Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO core-shell structure nano-powder precursors(c), Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO core-shell structure nano-powders(d)." } ] } ], "subcaption": [], "note": [], "graphics": [ { "print": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352302&type=", "small": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352311&type=", "big": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352306&type=" } ] } }, { "name": "fig", "data": { "id": "F5", "caption": [ { "lang": "en", "label": [ { "name": "text", "data": "Fig.5" } ], "title": [ { "name": "text", "data": "EDS mapping images of Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO core-shell structure nano-powders calcined at 750 ℃" } ] } ], "subcaption": [], "note": [], "graphics": [ { "print": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352316&type=", "small": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352327&type=", "big": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352320&type=" } ] } }, { "name": "p", "data": [ { "name": "xref", "data": { "text": "Fig.6", "type": "fig", "rid": "F6", "data": [ { "name": "text", "data": "Fig.6" } ] } }, { "name": "text", "data": " shows the micro-morphology of Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": " ceramics and Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO composite nano-ceramics, and the EDS mapping images of Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO composite nano-ceramics. From " }, { "name": "xref", "data": { "text": "Fig.6(a) and (b)", "type": "fig", "rid": "F6", "data": [ { "name": "text", "data": "Fig.6(a) and (b)" } ] } }, { "name": "text", "data": ", the average grain size of the Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": " ceramics is about 100 μm, while the average grain size of the Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO composite nano-ceramics is about 360 nm. It can be seen from the image that Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": " ceramics show larger grains and irregular grain growth, while the grains of Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO composite nano-ceramics are smaller and the grain growth is more uniform. Following BSE images and EDS mapping images, in " }, { "name": "xref", "data": { "text": "Fig.6(d)", "type": "fig", "rid": "F6", "data": [ { "name": "text", "data": "Fig.6(d)" } ] } }, { "name": "text", "data": ", the white phase and black phase are respectively Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": " and MgO. At the same time, the grain size of MgO is generally smaller than that of Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": ", and the larger MgO grains may be caused by the incomplete coating structure. And from the " }, { "name": "xref", "data": { "text": "Fig.6(d)", "type": "fig", "rid": "F6", "data": [ { "name": "text", "data": "Fig.6(d)" } ] } }, { "name": "text", "data": ", obviously, it can be seen that the black phase is surrounded by the white phase, that is, MgO is surrounded by Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": ", which corresponds to the prepared core-shell structure nano-powders, thus confirming the construction of the core-shell structure. The core-shell structure nano-powders are beneficial to a more even distribution of the two grains, which is conducive to inhibiting growth of ceramic grains in a smaller scale. It indicates that the core-shell structure nano-powders has a certain binding effect on the grain growth during sintering, making the grains unable to grow at will." } ] }, { "name": "fig", "data": { "id": "F6", "caption": [ { "lang": "en", "label": [ { "name": "text", "data": "Fig.6" } ], "title": [ { "name": "text", "data": "SEM images of Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": " ceramics(a) and Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO composite nano-ceramics(b). BSE images of Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": " ceramics(c) and Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO composite nano-ceramics(d). (e)-(g)EDS mapping images of (b)." } ] } ], "subcaption": [], "note": [], "graphics": [ { "print": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352331&type=", "small": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352343&type=", "big": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352337&type=" } ] } }, { "name": "p", "data": [ { "name": "xref", "data": { "text": "Fig.7", "type": "fig", "rid": "F7", "data": [ { "name": "text", "data": "Fig.7" } ] } }, { "name": "text", "data": " shows IR transmittance spectra of Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": " ceramics and Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO composite nano-ceramics." } ] }, { "name": "fig", "data": { "id": "F7", "caption": [ { "lang": "en", "label": [ { "name": "text", "data": "Fig.7" } ], "title": [ { "name": "text", "data": "IR transmittance spectra of Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": " ceramics and Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO composite nano-ceramics with the thickness of 0.9 mm. Inset: the photo of synthesized Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": " ceramics(left) and Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO composite nano-ceramics(right)." } ] } ], "subcaption": [], "note": [], "graphics": [ { "print": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352349&type=", "small": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352361&type=", "big": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352354&type=" } ] } }, { "name": "p", "data": [ { "name": "text", "data": "The transmittance of Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": " ceramics is higher than that of Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO composite nano-ceramics and reaches nearly 75% at about 6.5 μm, and the cut-off wavelength is about 10 μm. From the image, the Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": " ceramic is translucent, while the Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO composite nano-ceramic is completely opaque white at visual light range, which is more consistent with the results of the transmittance spectra. The transmittance of Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": " ceramics fluctuates at 3 μm, which should be due to the influence of residual water in the pores(the characteristic absorption peak of —OH is 2.94-3.12 μm), and the absorption peak of 4.3 μm coincides with the characteristic absorption peak of CO" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "(the characteristic absorption peak of CO" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": " is 4.26 μm). These two absorption peaks may be trapped in the pores and not removed during the sintering process, so it makes the characteristic absorption peaks appear when measuring the infrared transmittance. The low transmittance of Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO composite nano-ceramics may be due to the improper ratio of Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": " to MgO when preparing powders, low density of the ceramics, improper sintering temperature program and other factors that affect the performance, which need to be further studied and improved. From the infrared transmittance of Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO composite nano-ceramics, the transmittance at wavelength of 6 μm is the highest, reaching 57%, and the cut-off wavelength is about 8.3 μm. Similar to Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": " ceramics, the transmittance of composite nano-ceramics has absorption peaks at 3 μm and 4.3 μm, that is, water and CO" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": " exist in pores. The difference is that the composite nano-ceramics also have strong absorption peaks around 4.7 μm and 6.8 μm. The absorption peak at 4.7 μm matches the characteristic absorption peak of CO(the characteristic absorption peak of CO is 4.65 μm), while the absorption peak at 6.8 μm. The peak is more consistent with the characteristic absorption peak of C" }, { "name": "inlineformula", "data": [ { "name": "math", "data": { "graphicsData": { "print": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352365&type=", "small": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352371&type=", "big": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352368&type=" } } } ] }, { "name": "text", "data": "(the characteristic absorption peak of C" }, { "name": "inlineformula", "data": [ { "name": "math", "data": { "graphicsData": { "print": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352374&type=", "small": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352378&type=", "big": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352375&type=" } } } ] }, { "name": "text", "data": " is 6.54-7.58 μm). The generation of these impurities is due to the carburizing phenomenon that occurs during SPS sintering. Although LiF sintering aid is added during sintering, the density of the ceramics is improved to a certain extent and some carbon is taken away, but the density is still not high enough to make the carburizing phenomenon disappear." } ] }, { "name": "p", "data": [ { "name": "xref", "data": { "text": "Fig.8", "type": "fig", "rid": "F8", "data": [ { "name": "text", "data": "Fig.8" } ] } }, { "name": "text", "data": " shows the comparison of Vickers hardness of Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": " ceramics and Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO composite nano-ceramics. The Vickers hardness of Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": " ceramics is about 780 HV, and the Vickers hardness of Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO composite nano-ceramics is about 820 HV. Compared with Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": " ceramics, after adding MgO, its mechanical properties have indeed improved. However, its hardness is far from reaching the required level, so the powder preparation and sintering process still need to be improved." } ] }, { "name": "fig", "data": { "id": "F8", "caption": [ { "lang": "en", "label": [ { "name": "text", "data": "Fig.8" } ], "title": [ { "name": "text", "data": "Vickers hardness of Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": " ceramics and Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO composite nano-ceramics" } ] } ], "subcaption": [], "note": [], "graphics": [ { "print": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352381&type=", "small": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352387&type=", "big": "http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=21352384&type=" } ] } } ] }, { "name": "sec", "data": [ { "name": "sectitle", "data": { "title": [ { "name": "text", "data": "4　Conclusion" } ], "level": "1", "id": "s4" } }, { "name": "p", "data": [ { "name": "text", "data": "Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO core-shell structure nano-powders with the particle size of about 250 nm were successfully prepared by urea precipitation method. Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO composite nano-ceramics with the average grain size of 360 nm are accomplished " }, { "name": "italic", "data": [ { "name": "text", "data": "via" } ] }, { "name": "text", "data": " SPS treatment. Grain size of Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO composite nano-ceramics is more uniform and smaller compared with Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": " ceramics, indicating that the core-shell structure has certain binding effect on the grain growth. This core-shell structure nano-powders preparation method offers a new approach to further control the grain size of nano-composite ceramics. However, the transmittance and Vickers hardness of Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO composite nano-ceramics are not good enough, so the powder preparation and sintering process still need to be explored. Together with the SPS treatment, the method accomplished in this work provides a novel way to fabricate Y" }, { "name": "sub", "data": [ { "name": "text", "data": "2" } ] }, { "name": "text", "data": "O" }, { "name": "sub", "data": [ { "name": "text", "data": "3" } ] }, { "name": "text", "data": "-MgO composite nano-ceramics." } ] }, { "name": "p", "data": [ { "name": "text", "data": "Response Letter is available for this paper at:http://cjl.lightpublishing.cn/thesisDetails#10.37188/CJL.20210095." } ] } ] } ], "footnote": [], "reflist": { "title": [ { "name": "text", "data": "References" } ], "data": [ { "id": "R1", "label": "[1]", "citation": [ { "lang": "en", "text": [ { "name": "text", "data": "HARRIS D C" }, { "name": "text", "data": ". " }, { "name": "text", "data": "Durable 3-5 μm transmitting infrared window materials" }, { "name": "text", "data": " [J]." }, { "name": "text", "data": "Infrared Phys. 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