Study of Organic Modification for SrAl2O4:Eu2+, Dy3+ Phosphors

被引：0
|
作者：
Lu, Xingdong [1 ,2 ]
Liu, Xiaohua [1 ,3 ]
Gai, Guosheng [1 ]
机构：
[1] Tsinghua Univ, Dept Mat Sci & Engn, Beijing 100084, Peoples R China
[2] Jiangxi Univ Finance & Econ, Dept Elect, Nanchang 330013, Peoples R China
[3] Inner Mongolia Univ Technol, Coll Mat & Engn, Hohhot 010062, Peoples R China
来源：
POWDER TECHNOLOGY AND APPLICATION | 2009年 / 58卷
关键词：
phosphor; encapsulation; methylmethacrylate; silane coupling agent; water resistance; MECHANISM;
D O I：
暂无
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Methylaminopropyltrimethoxysilane (MAPS) coupling agent was used to pre-modify SrAl2O4:Eu2+, Dy3+ phosphors, and then graft methylmethacrylate (MMA) on SrAl2O4:Eu2+, Dy3+ phosphors. IR, SEM and TEM measurements showed that there is an organic encapsulation film composed of silane modified poly(methylmethacrylate) (PMMA) on phosphor surface. This organic film encapsulated on phosphor surface like dense reticulation with a thickness of 20-30 nm. The water resistance and oil absorption measurements and persistent luminescent properties showed that after being encapsulated, SrAl2O4:Eu2+, Dy3+ phosphors has much better water resistance and lower oil absorption with little loss of persistent phosphorescence. The emission intensity and afterglow lifetime of the encapsulated phosphors were reduced to 93% and 95% of the originals, respectively.
引用
收藏
页码：169 / +
页数：3
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