Patent ID: 9005568
Filing Date: 2015-04-14
Classification: C01G,C01P,C04B,H01B

Abstract:
1. A process for production of powder of a perovskite compound which comprises: a first step by a hydrothermal process, an alkoxide process, or a sol-gel process for obtaining an aggregate of perovskite compound, which comprises at least one A group element selected from the group consisting of Mg, Ca, Sr, Ba and Pb and at least one B group element selected from the group consisting of Ti, Zr, Hf and Sn, and which is represented by a formula wherein A is at least one A group element and B is at least one B group element; and a second step for heating the aggregate of perovskite compound, which is obtained in the first step, in an aqueous solution containing at least one base selected from the group consisting of an alkali metal hydroxide, an alkaline earth metal hydroxide, and an organic amine, at a temperature in a range from 180° C. to 500° C. in absence of grinding media, thereby disintegrating the aggregate, wherein in the second step, the base in the aqueous solution has been added after the aggregate of perovskite compound is formed.