本文通过燃烧法在700~850℃制备了CaMoO4:Tb^3+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5rain,最佳Ca^2+与Tb^2+的物质的量比为1:0.05左右。所得CaMoO4:Tb^3+材料在295nm处近紫外光激发下发射出较强的544nm处的绿色光,对应于Tb^3+的^5D4-^7F5跃迁。由于配位场对Tb^3+的微扰导致544nm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.