Sm^(3+)/Al_2O_3介孔复合体的光致发光特性  

CHARACTERISTICS OF PHOTOLUMINESCENCE OF Sm^(3+) /Al_2O_3 MESOPOROUS COMPOSITE

作　　者：孙献亭[1] 姚连增[1] 牟季美[1] 石刚[1] 张义民 

机构地区：[1]中国科学技术大学材料科学与工程系

出　　处：《硅酸盐学报》2000年第5期472-474,共3页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金!资助项目 (1 9974 0 4 1 )

摘　　要：用溶胶 -凝胶法和超临界干燥技术制备了Sm3+/Al2 O3气凝胶介孔复合体 ,并对其光致发光特性进行了系统的研究 .实验发现 :随退火温度的升高 ,Sm3+在Al2 O3 气凝胶中荧光强度逐步增强 ,90 0℃退火时达到最强 ,其后发光强度会随退火温度升高而减弱 ;随着Sm3+含量上升其发光强度也会发生由弱到强再到弱的变化 .Sm 3+ /Al 2O 3 aerogel mesoporous composites were synthesized by a sol-gel route and supercritical drying technique. Results of photoluminescence measurement show that with raising the annealing temperature, the photoluminescence of Sm 3+ in Al 2O 3 aerogel increase progressively. The luminescence intensity reached its maximum at 900 ℃, above which the intensity diminished. Analogously, the photoluminescence change from weak to strong and then become weak with increasing the density of Sm 3+ in the composites.

关 键 词：钐 三氧化二铝 气凝胶 超临界干燥 光致发光 

分 类 号：O648.17[理学—物理化学] TQ028.67[理学—化学]