碱土金属铝酸盐系列长余辉磷光体的制备研究  

Synthesis of MAl_2O_4∶Eu^(2+)(M= Ca, Sr, Ba) Phosphors with Long Persistent Luminescence

作　　者：翟玉春[1] 张新[1] 李建中[1] 田彦文[1] 

机构地区：[1]东北大学冶金与材料物理化学研究所,辽宁沈阳110004

出　　处：《中国稀土学报》2003年第2期205-208,共4页Journal of the Chinese Society of Rare Earths

基　　金：辽宁省自然科学基金资助项目(9910300501)

摘　　要：研究了MAl2O4∶Eu2+(M=Ca,Sr,Ba)磷光体的制备过程,通过向磷光体中引入微量Dy3+,B3+等添加剂离子,得到了发绿色光的超长余辉磷光体,余辉发光初始亮度达4.8cd·m-2,激发停止50h后,其余辉发光仍清晰可见。制备出发紫色光、蓝色光及黄色光的碱土金属铝酸盐系列长余辉磷光体。分析了各磷光体发射光谱、激发光谱及余辉发光,讨论了磷光体的光谱移动以及Eu2+在碱土金属铝酸盐中的发光。The synthesis of MAl2O4∶Eu2+(M= Ca, Sr, Ba) phosphors was studied. The luminescence properties of greenemitting SrAl2O4∶Eu2+ phosphor with long afterglow was improved by introducing Dy3+, B3+ and Na+ into the phosphors. With its initial brightness of 4.8 cd·m-2, the afterglow of the phosphor is distinctly visible within 50 h after a full excitation. The purpleemitting, blueemitting and yellowemitting phosphors were also prepared. The emission spectra, excitation spectra and decay curves of some prepared phosphors were shown. The spectra shift and the luminescence of Eu2+ in the alkaline earth aluminate phosphors were discussed.

关 键 词：功能材料 长余辉磷光体 高温合成 多种发光颜色 碱土金属铝酸盐 填加剂 稀土 

分 类 号：TB57[理学—物理]