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상용분말로 제조된 Ce_(0.8)Gd_(0.2)O(2-δ)세라믹스의 소결성에 미치는 Ga₂O₃의 첨가효과
최광훈,이주신 경성대학교 공학기술연구소 2003 공학기술연구지 Vol.10 No.-
The effects of Ga₂0₃ additions on sintering behavior of Ce_(0.8)Gd_(0.2)O_(2-δ) ceramics were investigated by the use of commercial powders. Sintered density was the highest at the specimen containing 0.5 mol% Ga₂0₃. Grain size was the largest at the specimen containing 0.5 mol% Ga₂0₃ also. Up to 3 mol% Ga₂0₃ addition, the sintered density of the specimens containing Ga₂0₃ was higher than that of pure specimen. Over 3 mol% Ga₂0₃ addition, grain size was decreased by a pinning effect of Gd₃Ga_(5)Oi₂ precipitation. Ga₂0₃ addition in Gd₂0₃-doped CeO₂ promoted the grain growth, and it brought the increase in density. It is suggested that Ga₂0₃ addition has an affirmative effect on the sintering behavior of Ce_(0.8)Gd_(0.2)O_(2-δ) ceramics prepared by commerical powders.