チタン酸バリウム微粒子のゾル-ゲル合成に及ぼす混合条件の影響

概要

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In the sol-gel synthesis process of barium titanate ultra-fine particles with using barium hydroxide aqueous solution and titanium alkoxide solution, the relationship between mixing condition of both solutions and the properties of particles was investigated. The static mixer was used as reactor and the mixing condition was quantitatively characterized by flow rate of solution in static mixer. Mean particle size and the width of sizedistribution of cubic-barium titanate ultra-fine particles were decreased with increasing flow rate, because the initial generated concentration of nucleation was increased by rapid mixture of solutions. Since the density of the hydroxyl group in a lattice of cubic barium titanate was increased with increasing flow rate, barium titanate had lattice structure of the expanded cubic perovskite.
2003-01-01