Barium carbonate particle powder, production method thereof, and production method of perovskite barium titanate

摘要

A rod-like barium carbonate particle powder excellent in dispersibility and small in aspect ratio and a production method thereof are provided. The rod-like barium carbonate particle powder includes rod-like particles having one or two or more constricted portions on the particle surface and the aspect ratio of the rod-like particles is 1.5 to 4.5. The BET specific surface area of the rod-like particle is 15 m<Sup>2</Sup>/g or more. The constricted portions are disposed in the direction perpendicular to or inclined from the long axis direction of the rod-like particles. The production method of the rod-like barium carbonate particle powder includes a step of heat treating an aqueous slurry containing an acicular barium carbonate particle powder at 50°C or higher.
Also claimed are a method for producing perovskite barium titanate making use of the barium carbonate particle powder and a barium source comprising the barium carbonate powder.