PRODUCTION OF BARIUM CARBONATE AND PRODUCED BARIUM CARBONATE AND BARIUM TITANATE OBTAINED FROM THE BARIUM CARBONATE

摘要

PROBLEM TO BE SOLVED: To provide a method for producing fine barium carbonate, having a small particle size and suitable as a raw material for barium titanate used for laminated capacitors at a relatively low cost. ;SOLUTION: This method for producing barium carbonate comprises reacting the aqueous solution of a barium salt such as barium dichloride with the aqueous solution of a carbonate such as ammonium carbonate or with carbon dioxide in the presence of ascorbic acid and/or pyrophosphoric acid. The aqueous solution of the barium salt preferably excessively contains the barium salt in the equivalent amount or more. The fine barium carbonate having a specific surface area of 5-40 m2/g can easily be produced. When the barium carbonate is further mixed with fine titanium dioxide and sintered, barium titanate suitable for electronic parts can be produced.;COPYRIGHT: (C)2000,JPO