诱导水解法制备微细高分散金红石型二氧化钛

Preparation of Fine and Highly Dispersed Rutile Titanium Dioxide by Induced Hydrolysis

采用加热TiCl4稀溶液的方式,制备晶种,将其导入一定浓度的TiCl4溶液中进行诱导水解。所得的偏钛酸经干燥、煅烧后得到分散性好,D50为1 mm以下,金红石含量为≥95%的高纯TiO2,可用于生产PTC热敏电阻等铁电陶瓷。

Seed crystal was prepared by heating weak solution of TiCl4. H2TiO3 was obtained by hydrolyzing the solution of TiCl4 of fixed concentration with seed crystal introduced. Of the pure TiO2 obtained by drying and calcining H2TiO3, D50 is < 1 mm and rutile contain 95%. It can be used for making PTC thermistors.