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HIGH PURE AND SINGLE PHASE BARIUM TITANATE FINE POWDER AND PROCESS FOR PRODUCING THE BARIUM TITANATE FINE POWDER WITHOUT PRODUCING SECONDARY PHASES
HIGH PURE AND SINGLE PHASE BARIUM TITANATE FINE POWDER AND PROCESS FOR PRODUCING THE BARIUM TITANATE FINE POWDER WITHOUT PRODUCING SECONDARY PHASES
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机译：高纯单相钛酸钡细粉及其生产工艺，不生产二次相
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摘要
PURPOSE: A high pure and single phase barium titanate(BaTiO3) fine powder is provided, which is used as a dielectric material for an MLCC(multilayer ceramic capacitor) thin film. And a process is also provided to produce the barium titanate fine powder without secondary phases by a hydrothermal process. CONSTITUTION: The barium titanate powder has the Ba/Ti ratio of 0.99-1.01 and a K-factor of 4-7. And the process for producing the barium titanate powder comprises the steps of: weighing a titanium containing hydroxide and a barium hydroxide accurately, wherein the molar ratio of Ba:Ti is 1:1; dissolving the titanium containing hydroxide powder and the barium hydroxide in distilled water each and mixing the solutions to make a slurry; hydrothermally reacting the slurry at 100-250deg.C to prepare a first barium titanate powder; filtering the first barium titanate powder and washing and drying; calcining the first barium titanate powder at 900-1300deg.C.
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