Surface modification of SrAI204:Eu2+, Dy3+ phosphors using silica encapsulation
Silica encapsulated phosphors SrAI204:Eu2+, Dy3+ have been synthesized by non-homogeneous phase coring method, in which glycerol was firstly used as dispersion medium and hyper-dispersant was introduced as additive. IR, BET and scanning electron microscopy (SEM) demonstrated that a dense layer of silica was formed on the surface of phosphor SrAI2Oa:Eu2, Dy3+.The results showed that the encapsulated phosphors possess good properties in water-resistance,heat-resistance and dispersibility when encapsulation amount reached 8 wt. ％. Moreover, the photoluminescence intensity of phosphors SrA1204:Eu2+, Dy3+ was improved apparently after surface modification. All results revealed that silica encapsulation would effectively improve alkaline earth aluminates phosphors properties and using glycerol as the dispersion medium is helpful to silica encapsulation.
aluminate-based phosphors silica encapsulation modification
Ruifang Li Junwei Ye Jinghui Wang Xiaobin Lu Yuan Lin Guiling Ning
State Key Laboratory of Fine Chemicals and School of Chemical Engineering,Dalian University of Technology,158 Zhongshan Road,Dalian 116012,P.R.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
199-204
2008-04-01（万方平台首次上网日期，不代表论文的发表时间）