2016 年 124 巻 7 号 p. 768-773
In this study, Ca2+-Cr3+ co-doped YAG were prepared by solid state reaction. Various solid-solution phase were formed, e.g. Y3Al5O12, YAlO3 and YCaAl3O7. Phase composition and microstructure of the prepared materials were characterized by XRD and SEM. The effects of the Cr3+ single doping concentration, Ca2+/Cr3+ co-doping concentration and Ca2+/Cr3+ doping ratio on the infrared emission characteristics of the doped YAG were investigated. The experimental results demonstrated that the infrared emissivity of YAG could be significantly enhanced by Ca2+-Cr3+ co-doping and the optimum Ca/Cr doping ratio was estimated to be 1.0.