Effects of Particle Size of Alumina on the Behaviors of Tape Casting and Sintering of Alumina-Talc System

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J. Korean Ceram. Soc. > Volume 34(12); 1997 > Article

Journal of the Korean Ceramic Society 1997;34(12): 1213.

알루미나-활석계에서 알루미나의 입자 크기가 테이프 케스팅 및 소결 거동에 미치는 영향

윤원균, 김호양, 이정아, 김정주

경북대학교 무기재료공학과

Effects of Particle Size of Alumina on the Behaviors of Tape Casting and Sintering of Alumina-Talc System

ABSTRACT

Effect of particle size of alumina and amount of talc on tape casting and densification behaviors of alumina-talc system were investigated. The pseudoplastic behaviors of slurries increased with increase in amount of talc addition and decrease in alumina particle size. In case of using coarse alumina powder, densification of specimens were accelerated with increase of sintering temperature and amount of talc addition. On the contrary, fine alumina powder retarded of rearrangement of alumina particle during liquid phase sintering due to premature densification of alumina matrix region before formation of liquid phase and then densification of specimens were suppressed with increase of sintering temperature and amount of talc addition.

Key words: Alumina, Talc, Particle size, Tape casting, Liquid phase sintering