The Synthesis of High-purity Zirconia Powders and Its Properties (Compaction and Sintering Behaviro as a Function of Granulation Methods)

,; ,; ,; ,; ,; ,; ,; ,

J. Korean Ceram. Soc. > Volume 25(4); 1988 > Article

Journal of the Korean Ceramic Society 1988;25(4): 357.

고순도 지르코니아 분말의 합성 및 그 특성 (조립방법에 따른 성형 및 소결 특성)

김환, 이종국, 김주영, 황규홍¹

서울대학교 무기재료공학과
¹경상대학교 재료공학과

The Synthesis of High-purity Zirconia Powders and Its Properties (Compaction and Sintering Behaviro as a Function of Granulation Methods)

ABSTRACT

Ccompaction and sintering behavior of highly pure PSZ powders were investigated by laying the stress on the granulation processes. The particle size of coprecipitated PSZ powder was so fine that the agglomeration was severely formed during drying and calcing step and by this agglomeration differential sinering was occurred. The methanol dispersion of precipitates was the good method of avoiding severe agglomeration formed during drying process because of small surface tension than water. But perfect deagglomeraton was not possible due to high surface area of powders. So homogenization by granulation was needed, and among the method spray granulation was the most desirable to obtain homogeneous compacts and subsequent flaw-free ceramics.