PROCESS FOR PRODUCING PEROVSKITE COMPOUND POWDER

摘要

The invention provides a process for production of powder of perovskite compound which comprises:
the first step 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 the general formula
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒABO 3
wherein A is at least one A group element and B is at least one B group element; and
the second step for heating the aggregate of perovskite compound obtained in the first step in a solvent at a temperature in a range from 30°C to 500°C whereby disintegrating the aggregate. The process makes it unnecessary to resort to a conventional mechanical crushing means or to make use of impact caused by milling media or airflow, but it makes possible to obtain a powder of perovskite compound which is not contaminated with impurities derived from milling media or chipping particles but has a high purity and a narrow particle size distribution.