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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.118  No.1381 (September) (2010)  >  pp.784-787

Journal of the Ceramic Society of Japan
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Afterglow luminance property of phosphorescent phosphor SrAl2O4:Eu2+,Dy3+-glass composites

Hideki YOSHIDA1), Shigeru FUJINO2) and Toshihisa KAJIWARA2)
1) Ceramic Research Center of Nagasaki
2) Department of Chemical Engineering, Faculty of Engineering, Kyushu University

  The effect of mixing ratio, firing temperature and matrix glass composition on afterglow luminance property of SrAl2O4:Eu2+,Dy3+-glass composites were investigated. As a result, the brightness showed a maximum at 35 mass % of the mixing ratio of the phosphor for the glass and 780°C of the firing temperature. And it was increased with decreasing the Na2O content of the matrix glass. From the backscattered electron and the EDX analysis, it is thought that the intermediate layers generated between the phosphors and the Na2O-poor matrix glass work as antireflective and the phosphor particles in the composite emit phosphorescent light more efficiently. As higher the basicity parameter, B, the intermediate layer was clearer, which means that the reactivity at the phosphor/glass boundaries was lower, and the narrow reaction layers was formed.

Phosphorescent phosphor, SrAl2O4:Eu2+,Dy3+, Glass matrix, Composite, Afterglow luminescence, Glass composition, Intermediate layer, Basicity parameter

Received: March 10, 2010
Accepted: June 17, 2010 , Published online: September 01, 2010
Copyright (c) 2010 The Ceramic Society of Japan



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