纯相稀土硫化物红色发光材料的高温微波合成及其光谱性质

纯相稀土硫化物红色发光材料的高温微波合成及其光谱性质 Microwave-prepared Pure Host Phase CaS:Eu 2+ Phosphor and Its Photoluminescence Property 张长江 ZHANG Chang-jiang 1 first-author 王保安 WANG Bao-an 1 王银超 WANG Yin-chao 1 王延泽 WANG Yan-ze 1 马健 MA Jian 1 毛智勇 MAO Zhi-yong 2 苏柳 SU Liu 1 孙亮 SUN Liang 2 王达健 WANG Da-jian 2 邯郸市盛德技术玻璃有限公司,河北 邯郸,056000 邯郸市盛德技术玻璃有限公司,河北 邯郸,056000 Shengde Technology Glass Co., Ltd. Shengde Technology Glass Co., Ltd. 天津理工大学 材料科学与工程学院 天津,300384 天津理工大学 材料科学与工程学院 天津,300384 School of Materials Science and Engineering, Tianjin University of Technology School of Materials Science and Engineering, Tianjin University of Technology 采用工业频率为2.45 GHz的高温微波法制备了纯基质相的CaS:Eu 2+ 红色发光材料,激发波段为410~580 nm,发射峰值波长为654 nm.在微波输入功率为1.0~1.1 kW的条件下,可以获得纯基质相CaS:Eu 2+ 发光材料;在1.2~1.3 kW功率范围,获得的样品中含有CaO杂质相,且颗粒团聚严重.其中,1.1 kW制备的CaS:Eu 2+ 样品相纯度最高,发光性能最优.微波功率的变化本质上揭示了固体颗粒的介电损耗因子及其加热特性的变化,体系涉及的非平衡反应机制促使了纯基质相的形成,并影响材料晶相结构、粒径、形貌和发光性能.结果显示,高温微波制备技术通过控制输入功率及其物料的介电损耗性质,能够获得纯基质相并且颗粒小、团聚少的荧光粉. Classical blue-green excitable CaS:Eu 2+ phosphor with desired red emission was synthesized by microwave (MW) field with a high frequency of 2.45 GHz. The phosphors can be excited in a wavelength range from 410 nm to 580 nm. In particular, the phosphors exhibit a 476 nm excitable 654 nm peaked red emission. The effect of MW power on material crystal structure, particle size, morphology and luminescent properties was researched by varying the firing power of MW. It has been established that the dielectric property of materials affects MW heating process. MW power supply acts as an effective indicator to predict the viability of dielectric property of materials due to the MW energy. The results show that the variation of MW power can not affect the crystal field of Eu 2+ in lattice matrix. It is obvious that the phase purity, particle size, and morphology are different with the variation of applied MW power. 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