Paper Title:
Surface Modification of SrAl2O4:Eu2+, Dy3+ Phosphors Using Silica Encapsulation
  Abstract

Silica encapsulated phosphors SrAl2O4: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 SrAl2O4: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 SrAl2O4: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.

  Info
Periodical
Edited by
Guosheng Gai
Pages
199-204
DOI
10.4028/www.scientific.net/AMR.58.199
Citation
R. F. Li, J. W. Ye, J. H. Wang, X. B. Lu, Y. Lin, G. L. Ning, "Surface Modification of SrAl2O4:Eu2+, Dy3+ Phosphors Using Silica Encapsulation", Advanced Materials Research, Vol. 58, pp. 199-204, 2009
Online since
October 2008
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