CaMoO_4:Tb^(3+)的制备与发光性能研究  

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

作　　者：娜米拉[1,2] 王福明[1] 王喜贵[2] 庞瑞朋[1] 

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,内蒙古呼和浩特010022

出　　处：《内蒙古师范大学学报（自然科学汉文版）》2013年第3期340-343,349,共5页Journal of Inner Mongolia Normal University(Natural Science Edition)

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

摘　　要：运用柠檬酸溶胶-凝胶燃烧法制备了CaMoO4:Tb3+绿色荧光粉,通过傅立叶变换红外光谱、激发光谱与发射光谱等技术研究了粉末的结构和发光性质.IR结果显示,在800℃退火处理后,没有出现其他有机物的峰,说明柠檬酸已经完全分解,掺杂的少量Tb3+已完全溶入CaMoO4的晶格中,形成了CaMoO4:Tb3+固溶体;激发与发射光谱测试结果表明,在295nm近紫外光激发下,出现了很强的544nm处的发射峰,对应于Tb3+的5 D4-7F5跃迁,同时观察到此发射峰发生了分裂,这是配位场对Tb3+的微扰导致Stark分裂所致.Tb^3＋ doped CaMoO4 materials were synthesized by sol-gel combustion method and the structure and luminescent properties were characterized by IR, excitation and emission spectra. IR results show that there were no other organic peaks after annealing at 800 ℃ ,indicating that citric acid has been completely decomposed and a small amount of Tba＋ ions have been fully integrated into the lattice of CaMoO4, formed solid solution of CaMoO4 ：Tb^3＋. The results of the excitation and emission spectra show that the strongest emission peak was at 544 nm when excited with 295 nm ultraviolet light, which corre-sponds to the ^5D4-^7F5 transition of Tb^3＋. Meanwhile,the emission peak is observed splitting which is the perturbation of ligand field for Tb^3＋ ions lead tn Stark splitting.

关 键 词：溶胶一凝胶燃烧法 CaMoO4 TB^3+ 发光性质 

分 类 号：O614.6[理学—无机化学] O614.3[理学—化学]