Preparation of Alumina Coated Zirconia Powder by Hydrolysis of Aluminum Butoxide

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J. Korean Ceram. Soc. > Volume 32(12); 1995 > Article

Journal of the Korean Ceramic Society 1995;32(12): 1401.

가수분해법에 의한 알루미나 코팅 지르코니아 분말의 제조

이종국, 김윤수¹, 김환¹

조선대학교 재료공학과
¹서울대학교 무기재료공학과

Preparation of Alumina Coated Zirconia Powder by Hydrolysis of Aluminum Butoxide

ABSTRACT

Zirconia powder coated with alumina was prepared by hydrolysis of alumina butoxide. The coated powder was obtained by a hydrolysis reaction between the adsorbed water on the surface of zirconia particles and aluminum sec-butoxide. Amorphous aluminum hydroxide was uniformly coated on the surface of zirconia particles with the thickness of about 30 nm. The shape and distribution of aluminum hydroxide was varied with an existence of surfactant. The coated layer of aluminum hydroxide consists of the fine particle size, and the zirconia powder coated by alumina hydroxide have the large specific surface area of 120 $m^2$/g, compared with that of starting zirconia powder.

Key words: Alumina coated zirconia powder, Surfactant, Hydrolysis of auminum butoxide