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1. 暨南大学 化学系
2. 暨南大学 纳米化学研究所
收稿:2008-09-04,
修回:1900-1-2,
网络首发:2009-06-30,
纸质出版:2009-06-30
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李锦清, 杨创涛, 孟建新. 水热法制备MgWO4 及其发光性质[J]. 发光学报, 2009,30(3):327-331.
LI Jin-qing, YANG Chuang-tao, MENG Jian-xin. Hydrothermal Synthesis of MgWO4 and Its Luminescence[J]. Chinese Journal of Luminescence, 2009, 30(3): 327-331.
以硝酸镁、钨酸钠为原料
氢氧化钠和硝酸作为pH调节剂
在180~230 ℃水热条件制备纯相的MgWO
4
。探讨了水热反应温度对MgWO
4
纯相形成以及煅烧温度对其晶型、发光性质的影响。分别用粉末X射线衍射、荧光光谱、扫描电子显微镜和综合热分析等手段对样品进行表征。结果表明
水热法可以直接制得不含结晶水MgWO
4
晶体
属于四方晶系
形貌呈片状
厚度约为几个纳米。样品热重分析和高温煅烧的结果表明
水热法所得MgWO
4
晶体在850 ℃附近出现晶型转化
由四方晶系转变为单斜晶系
并导致发光性质的明显变化。SEM显示煅烧前的样品形貌为片状
不同温度煅烧后由片状逐渐向棒状转变。
paper
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. Amberg M, Günter J R, Schmalle H, et al. Preparation, crystal structure, and luminescence of magnesium molybdate and tungstate monohydrates, MgMoO4·H2O and MgWO4·H2O [J]. J. Solid State Chem., 1988, 77 (1):162-169.
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