Sinterability and Luminescence Property of the MgO-YAG:Ce Phosphor Ceramic with Sintering Aids

MgO-YAG:Ce phosphor ceramics with the addition of Y 2 O 3 , SiO 2 , TiO 2 and ZrO 2 as sintering aids were developed from commercial powders by hot-pressing. In this work, the effects of Y 2 O 3 , SiO 2 , TiO 2 , ZrO 2 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.% SiO 2 was satisfying, reaching 98.4%, and the luminescence intensity reached the maximum. Because SiO 2 and MgO react to form interstitial solid solution Mg 2 SiO 4 , 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 SiO 2 does not react with YAG, maintaining the excellent luminescence properties of YAG itself.