钆或镧掺杂YAG:Ce^(3+)粉体的制备及其发光性能研究  

STUDY ON THE PREPARATION AND LUMINESCENCE OF YAG : Ce^(3+) CO-DOPED WITH GD OR LA PHOSPHOR POWDERS BY LOW-TEMPERATURE COMBUSTION SYNTHESIS

作　　者：武秀兰[1] 赵丹[1] 何选盟[1] 任强[1] 

机构地区：[1]陕西科技大学材料科学与工程学院,西安710021

出　　处：《中国陶瓷》2010年第12期18-20,24,共4页China Ceramics

基　　金：陕西省教育厅科研计划项目资助;编号:07JK196

摘　　要：以硝酸铝、氧化钇、氧化钆、氧化镧及硝酸铈为原料,尿素为燃烧剂,硝酸为溶剂,采用低温燃烧法制备了Gd3+或La3+掺杂YAG∶Ce3+粉体。利用XRD、光谱分析等分析方法研究了热处理温度、Gd3+或La3+掺杂量等因素对粉体的晶体结构、激发光谱和发射光谱的影响。结果表明:随Gd3+或La3+掺杂量的增加,粉体的发射光谱峰值红移幅度增大,发射强度略有降低,掺杂Gd3+粉体的发射光谱峰值最大红移18nm;掺杂La3+粉体的发射光谱峰值最大红移14nm。The YAG ： Ce^3＋ co-doped with Gd^3＋ or La^3＋ phosphor powders were prepared by low temperature combustion synthesis, using aluminum nitrite, yttrium oxide, lanthanum oxide and cerous nitrate as raw materials and urea as combustion additives in nitric acid solvent. The XRD and spectrum analysis were used to investigate the influence of heat treatment temperatures and replacement of Y^3＋ in YAG ： Ce^3＋ by Gd^3＋ or La^3＋ on crystal structure, emission and excitation spectrums. The results show that the extent of emission spectrum translating to red region increase and the emissive power intensify slightly reduce with doping content of Gd^3＋ or La^3＋ increasing. The biggest extent oI emission spectrum translating to red region of phosphor powders doped with Gd^3＋ is 18nm, yet phosphor powder doped with La^3＋is 14nm.

关 键 词：低温燃烧法 稀土离子掺杂 YAG:Ce^3+粉体 发射光谱 

分 类 号：O614.33[理学—无机化学]