Abstract
MgO-YAG:Ce phosphor ceramics with the addition of Y2O3, SiO2, TiO2 and ZrO2 as sintering aids were developed from commercial powders by hot-pressing. In this work, the effects of Y2O3, SiO2, TiO2, ZrO2 on the phase composition, microstructure, sinterability and luminescence intensity of MgO-YAG:Ce phosphor ceramic were investigated. By comparison, the relative density of MgO-YAG:Ce phosphor ceramic with 2 wt.% SiO2 was satisfying, reaching 98.4%, and the luminescence intensity reached the maximum. Because SiO2 and MgO react to form interstitial solid solution Mg2SiO4, which leads to the increase of the grain boundary energy of the MgO matrix, thereby increasing the sintering performance of MgO-YAG:Ce phosphor ceramics. And SiO2 does not react with YAG, maintaining the excellent luminescence properties of YAG itself.
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