Study of Organic Modification for SrAI2O4:Eu2+, Dy3+ Phosphors
Methylaminopropyltrimethoxysilane (MAPS) coupling agent was used to pre-modify SrAI204:Eu2+, Dy3+ phosphors, and then graft methylmethacrylate (MMA) on SrAi204:Eu:+, 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, SrAI204: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.
phosphor encapsulation methylmethacrylate silane coupling agent water resistance
Xingdong Lü Xiaohua Liu Guosheng Gai
Department of Electronics,Jiangxi University of Finance and Economy,Nanchang 330013,China;Department Department of Materials Science and Engineering,Tsinghua University,Bejing 100084,China;College of M Department of Materials Science and Engineering,Tsinghua University,Bejing 100084,China
国际会议
2008国际粉体技术与应用论坛暨全国粉体产品与设备应用技术交流大会
北京
英文
169-175
2008-04-01（万方平台首次上网日期，不代表论文的发表时间）