Correlation of the Green Microstructure of ZrO2 with the Colloid/Interface Variables

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J. Korean Ceram. Soc. > Volume 27(1); 1990 > Article

Journal of the Korean Ceramic Society 1990;27(1): 91.

Zirconia성형체의 미세구조와 콜로이드/계면변수와의 상관관계에 대한 분석

장현명, 한규호, 이기강¹, 정한남¹

포항공과대학 재료·금속공학과
¹산업과학기술연구소 에너지 연구부

Correlation of the Green Microstructure of ZrO2 with the Colloid/Interface Variables

ABSTRACT

The green microstructure and sintering behavior of ZrO2 were analyzed in terms of kinetic stability (measured by the stability ratio ; W) and interfacial characteristics of colloidal suspension. Green density and the most frequent pore radius(MFPR) of green body were directly correlated with the stability ratio. These observations were explained using a concept of the critical stability ratio(Wc) and the potential energy of two interacting particles in colloidal suspension. Analysis of the data also indicates that the potential energy barrier between two interacting colloid particles should be higher than its critical value for a fabrication of ZrO2 green body with dense and uniform microstructure. Besides, we have successfully applied a concept of the donoracceptor interaction to increase the kinetic stability of ZrO2 slip and density of green body.