Synthesis of Monodispersed Zirconia Powder by Hydrolysis of Zirconium Alkoxides

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J. Korean Ceram. Soc. > Volume 28(2); 1991 > Article

Journal of the Korean Ceramic Society 1991;28(2): 167.

알콕사이드의 가수분해법에 의한 단분산 지르코니아 분체의 합성

이전, 조동수

인하대학교 무기재료공학과

Synthesis of Monodispersed Zirconia Powder by Hydrolysis of Zirconium Alkoxides

ABSTRACT

In synthesizing hydrated zirconia powder by hydrolysis of Zr-alkoxides using ethanol as mutual solvent, three experimental parameters, namely, concentration of alkoxides and hydrolysis water and addition rate of hydrolysis water were varied systematically. Spherical, monodispersed, nonagglomerated and submicrometer sized powders were prepared at 0.3 M of Zr(n-OPr)4 and 0.05M of Zr(n-OBu)4 with wide ranges of hydrolysis water conditions i.e. 0.5-2.0M concentration and 1-20ml/min addition rate. During the hydrolsis, careful attention have to be paid to maintain homogeneous reaction by controlling the agitation of the reactant and the addition of the hydrolysis water. For more improved condition of monodispersity it was found that the key point is to shorten the self-nucleation time within several seconds as rapid as possible. In both alkoxides system, with higher concentration of alkoxide and hydrolysis water and with slow addition rate of hydrolysis water, hydrated zirconia powders synthesized showed tendency to fall in worse powder conditions.