Effect of Mixing Condition on Sol-Gel Synthesis of Barium Titanate Ultrafine Particles [Translated]†

概要

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We investigated the sol-gel synthesis process of barium titanate ultrafine particles with using barium hydroxide aqueous solution and titanium alkoxide solution. Emphasis was placed on the relationship between the mixing condition of both solutions and the properties of the particles. A static mixer was used as reactor and the mixing condition was quantitatively characterized by the f low rate of solutions in a static mixer. Mean particle size and the width of size distribution of cubic barium titanate ultrafine particles decreased with increasing f low rate, because the initial concentration of nuclei increased by rapidly mixing the solutions. Since the density of the hydroxyl group in the lattice of cubic barium titanate increased with increasing f low rate, barium titanate had a lattice structure of expanded cubic perovskite.† This report was originally printed in J. Ceramic Society of Japan, 111(1), 67-72 (2003) in Japanese, before being translated into English by KONA Editorial Committee with the permission of the editorial committee of The Ceramic Society of Japan.
公益財団法人ホソカワ粉体工学振興財団の論文