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Citation: LÜ Xing-Dong, SHU Wan-Gen. Organic Encapsulation on SrAl₂O₄:Eu²⁺,Dy³⁺Phosphors and Its Characterization[J]. Chinese Journal of Applied Chemistry, ;2005, 22(6): 638-642. shu

Organic Encapsulation on SrAl₂O₄:Eu²⁺,Dy³⁺Phosphors and Its Characterization

LÜ Xing-Dong ^a,, ,
SHU Wan-Gen ^b

1.
a Electronics College, Jiangxi University of Finance and Economy, Nanchang 330013;
2.
b Chemistry and Chemical Engineering College, Central-south University, Changsha

Corresponding author: LÜ Xing-Dong,
Received Date: 9 September 2004
Available Online: 29 December 2004
Fund Project: 湖南省自然科学基金项目(02JJY2021) (02JJY2021)

Silane coupling agent (MAPS) was used to introduce polymerizable groups (MMA) on phosphors' surface to form organic encapsulation for SrAl₂O₄:Eu²⁺,Dy³⁺phosphors.IR,SEM and TEM showed that the encapsulation film,which is composed of poly (methyl methacrylate) modified by silane,is a dense reticulation with a thickness of 20~30 nm.The water-resistance and oil absorption measurement results and persistent luminescent properties indicated that the encapsulated SrAl₂O₄:Eu²⁺,Dy³⁺phosphors had better water-resistance performance and lower oil absorption amount,and maintained good persistent photoluminescence properties.The fluorescence intensity and afterglow life of the phosphors were respectively reduced to 93% and 95% of that of the phosphor before organic encapsulation.
- phosphor,
- encapsulation,
- poly (methyl methacrylate),
- silane coupling agent
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Organic Encapsulation on SrAl₂O₄:Eu²⁺,Dy³⁺Phosphors and Its Characterization