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Vol.30, No.1, 7 ~ 15, 1992
Title
Preparation of Ultra Fine BaTiO3 Powders by Coprecipitation Method
성학경Hak Kyeong Sung, 원창환Chang Whan Won, 김한식Han Sik Kim
Abstract
The BaTiO₃ powders were prepared by coprecipitation method. BaCl₂ and TiCl₄ were used as starting materials and H₂C₂O₄ as a precipitation agent. Effects of synthesizing conditions on the properties and the crystal structure of powder were investigated by X-ray, SEM, TEM and chemical analysis. The best results were obtained as following conditions : mole ratio(BaCl₂ : TiCl₄ : H₂C₂O₄ = 1.03 : 1 : 2. 2), reaction temperature 80℃, The average particle sizes and specific surface areas of the powders calcined at 700℃ were 0.16㎛ and 6.091㎡/g, respectively.
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