Preparation of Ultrafine Barium Titanate Powder by Coprecipitation

Abstract

Abstract: This paper investigated the preparation of ultrafine barium titanate powders by using titanium tetrachloride and barium chloride as starting materials and
NH₄HCO₃+NH₃·H₂O as the precipitant. First of all, a thermodynamic analysis was made in detail to find out optimum synthesis
conditions. Experiment results show that the Ba/Ti ratio of starting materials, calcination temperature, pH value of solution, have a close effect
to the physical and chemical performances of the obtained powders. The best conditions are NH₄HCO₃/BaCl₂·2H₂O=1.2; TiCl₄/BaCl₂·2H₂O=1～1.01; reaction time=1h; calacination temperature=920℃ and calcination time 2h. The addition of some
dispersants into the reactant system can obviously reduce particle sizes of the product.

Key words: coprecipitation, barium titanate powders, synthesis

CLC Number:

TB383

QUAN Xue-Jun,LI Da-Cheng. Preparation of Ultrafine Barium Titanate Powder by Coprecipitation[J]. Journal of Inorganic Materials.

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Preparation of Ultrafine Barium Titanate Powder by Coprecipitation

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