CaMoO_4:Tb^(3+)发光材料的制备与发光性能研究  

Preparation and Luminescent Properties of CaMoO_4:Tb^(3+) Luminescent Materials

作　　者：娜米拉[1,2] 王福明[1] 王喜贵[2] 敖乐根 

机构地区：[1]北京科技大学冶金与生态学院,北京100083 [2]内蒙古师范大学化学与环境科学学院,呼和浩特010022 [3]内蒙古灵奕(集团)信息技术有限责任公司,呼和浩特010010

出　　处：《人工晶体学报》2014年第1期53-57,63,共6页Journal of Synthetic Crystals

基　　金：国家自然科学基金(50874007);内蒙古自然科学基金(2010MS0205)

摘　　要：本文通过燃烧法在700~850℃制备了CaMoO4∶Tb3+固溶体发光材料。研究了反应温度与粉末的结构、粒径以及发光性质之间的关系。同时也探讨了材料的优化工艺条件,即最佳燃烧温度为800℃,燃烧5 min,最佳Ca2+与Tb3+的物质的量比为1∶0.05左右。所得CaMoO4∶Tb3+材料在295 nm处近紫外光激发下发射出较强的544 nm处的绿色光,对应于Tb3+的5D4-7F5跃迁。由于配位场对Tb3+的微扰导致544 nm处的发射峰产生了Stark分裂。Abstract：Solid solution luminescent materials CaMoO4： Tb^3＋ were prepared by combustion method at 700-850℃C. The structure, particle size of powder and luminescent properties with the reaction temperature was studied. The optimization of process conditions of materials were as follows： the best combustion temperature is 800 ℃ and the burning time is 5 min ; the ratio of Ca^2＋ to Tb^3＋ is optimized as about 1 ： 0. 05. When excited with 295 nm, emission spectrum of CaMoO4 ： Tb^3＋ showed green fluorescence at 544 nm corresponding to the 5D4-7F5 transition of Tb^3＋. The splitting of the 544 nm emission peak is due to the perturbation of coordination filed for Tb^3＋ lead to Stark splitting.

关 键 词：烧法 CaMoO4 TB^3+ 发光性质 Stark分裂 

分 类 号：O614.6[理学—无机化学] O614.3[理学—化学]