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J. Korean Ceram. Soc. > Volume 34(10); 1997 > Article
Journal of the Korean Ceramic Society 1997;34(10): 1009.
기액반응법을 이용한 구형 지르코니아 미분체 제조시 pH의 영향
김창현, 이대희1, 이창섭2, 이병교1
가야대학교 공학부 세라믹공학과
1경북대학교 무기재료공학과
2계명대학교 화학과
Effect of pH on the Preparation of Spherical Fine Zirconia Powders Using Gas-Liquid Phase Reaction
Ammonia gas was blown into the solution of zirconium ion to induce precipitation of supersaturated zirconium ion at gas-liquid interface with increase in pH. The influence of pH on the phase and particle size of precipitate and calcined powders has been investigated. At pH 4.5 of zirconium solution, maximum yield of 98.7% was obtained. Above pH 4.5, there was no more increase of yield. Above pH 5.5, large aggregates consisting of primary particles were observed in precipitate and calcined powders. At pH 4.5, almost aggregate-free fine spherical zirconia powders were obtained.
Key words: Gas-liquid phase reaction, Interface, Precipitate, Aggregate
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