Preparation of <TEX>$BaTiO_3$</TEX> Powder by Coprecipitation Method

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J. Korean Ceram. Soc. > Volume 23(4); 1986 > Article

Journal of the Korean Ceramic Society 1986;23(4): 11.

공심법에 의한 $BaTiO_3$ 분말제조

김윤호, 이준¹, 한일호¹

한국과학기술원 정밀요업재료연구실
¹건국대학교 공업화학과

Preparation of $BaTiO_3$ Powder by Coprecipitation Method

ABSTRACT

$BaTiO_3$ ceramics powder was prepared by coprecipitation method either in oxalic acid solution or in potassium hydroxide solution. Thermal decomposition of coprecipitated $BaTiO(C_2O_4)_2$.$4H_2O$ powder in oxalic acid solution was investigated by means of Themogravimetry Differential Thermal Analysis and X-ray Diffraction Analysis. Low temperature decomposition of coprecipitated $BaTiO(C_2O_4)_2$.$4H_2O$ caused narrow particle size distribution whereas high temperature decomposition caused fairly wide particle size distribution by partial sintering. As the reaction time increased the average particle size of coprecipitated $BaTiO_3$ powder in KOH solution was increased. The most narrow paticle size distribution was obtained when the coprecipi-tates were ripened for 4hrs.