A method of preparing highly crystalline Barium-Titanate fine powder by Oxalate Process and highly crystalline Barium-Titanate fine powder prepared by the same

摘要

of barium titanate powder of highly crystalline barium titanate powder production method and the manufacture of high crystallinity by the way It is disclosed. Production method of the barium titanate powder of high crystallinity are described, (a) barium chloride (BaCl ₂ ) and an aqueous solution of titanium tetrachloride (TiCl ₄ ) comprising the steps of: providing an aqueous solution of ( b) injection of the aqueous solution of oxalic acid (H ₂ C ₂ O ₄ ) by dropping an aqueous solution of barium titanyl oxalate [BaTiO (C ₂ O ₄ ) ₂ 4H ₂ O] steps to produce a decision chunks, (c) the barium wet pulverizing the titanyl oxalate crystal mass, (d) drying said wet pulverized barium titanyl oxalate powder, and (e) a primary heat treatment of the barium titanate to the dried barium titanyl oxalate powder step to produce a crystal mass; including, wherein (e) and adjusting the degree of crystallization of barium titanate by controlling the degree of crystallization during the heat treatment the primary control factor (Governing factor of crystallinity) of the stage, the crystallinity control factor (m / A) is characterized in that the weight is defined as (m) of the dried barium titanyl oxalate powder to be filled in to the primary heat treatment is the heat per footprint (A) is carried out in a unit of heating. ; Therefore, the barium titanate powder produced by the production method of the barium titanate powder can be improved crystallinity, while having a uniform particle size distribution.