Silica encapsulation study on SrAl2O4:Eu2+,Dy3+ phosphors

被引：54

作者：

Lü, XD ^{[1
]}

机构：

[1] Jiangxi Univ Finance & Econ, Elect Coll, Nanchang 330013, Peoples R China

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2005年 / 93卷 / 2-3期

关键词：

encapsulation; phosphor; silica; aluminate;

D O I：

10.1016/j.matchemphys.2005.04.002

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A new chemical precipitation method for silica encapsulation was firstly used in surface treatment of SrAl2O4:Eu2+, Dy3+ phosphors. X-ray fluorescent spectrometer (XRF), FTIR and scanning electron microscopy (SEM) results showed that a dense layer of silica is formed on phosphor surface after being encapsulated for 2.5 h under the condition of pH 10.5 and T= 80 +/- 1.0 degrees C. Water-resistance and photoluminescence measurement results showed that encapsulation amount and dispersing media play an important role in water-resistance of phosphors. Using glycol as dispersing media and controlling encapsulation amount at 5 wt.% would effectively improve water-resistance of SrAl2O4:Eu2+, Dy3+ phosphors at the cost of a minor loss of persistent phosphorescence. (c) 2005 Published by Elsevier B.V.

引用

页码：526 / 530

页数：5

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