Preparation of Al2O3-ZrO2 Composite Powders by the Use of mulsions : II. Emulsion-Hot Kerosene Drying Method

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J. Korean Ceram. Soc. > Volume 25(3); 1988 > Article

Journal of the Korean Ceramic Society 1988;25(3): 284.

에멀젼을 이용한 Al2O3-ZrO2 복합분체의 제조 : II. 에멀젼-가열석유 증발법

현상훈, 백종규

연세대학교 요업공학과

Preparation of Al2O3-ZrO2 Composite Powders by the Use of mulsions : II. Emulsion-Hot Kerosene Drying Method

ABSTRACT

Alumina-zirconia composite powders for the purpose of improving fracture toughness and thermal shock resistance of alumina were prepared by the emulsion-kerosene drying method. The average particle size of composite powders was less then 1 $mutextrm{m}$ and their shapes were spherical. It was shown that the average particle size of composite powders decreased with the concentration of metal-salt in solution and the amount of span 80 added when preparing emulsions. The structure of all zirconia in composite powders heat-treated at 1200$^{circ}C$ was a tetragonal form at room temperature. This result implied that fine zirconia particles were homogeneously dispersed in the alumina matrix.