Ceramics and their power for scintillators, and method for producing same

摘要: A sintered ceramic for a scintillator having composition represented by the general formula of Gd 3-x Ce x Al y Si z Ga 5-y-z O 12 , wherein 0.001≦x≦0.05, 1≦y≦4, and 0.0015≦z≦0.03, is produced mixing gadolinium oxide, aluminum gallium cerium salt, silicon compound fluorine in such proportions as to provide above composition; calcining resultant mixture at temperature 1400-1600° C.; disintegrating calcined body powder; pressing powder green body; sintering 1600-1700° C. non-oxidizing atmosphere 5×10 4 Pa or more, optionally further hot isostatic an argon atmosphere.