Abstract:
PURPOSE: A manufacturing method of high-crystalline barium titanate and highly crystalline barium titanate powder manufactured with the method are provided improve high crystallization axial ratio, particle size distribution, and dispersibility by slowly planting under high temperature and pressure a seed. CONSTITUTION: A manufacturing method of highly crystalline barium titanate comprises next steps: preparing ionized BaOH by heating Barium(Ba)(S1); preparing titanium(Ti) original material which is dispersed in acid or base(S2); obtaining barium titanate seed by mixing and reacting the BaOH and titanium atom ash(S3); growing the barium titanate seed under high temperature and pressure by mixing with pure water and grain growth inhibitor(S4,S5); and manufacturing highly crystalline barium titanate powder(S6). The step (S3) operates at 80 degree Celsius or greater.
Abstract:
The present invention relates to a method for manufacturing highly crystalline silicon dioxide (SiO_2)-coated barium titanate powder and to highly crystalline silicon dioxide-coated barium titanate powder. The method for manufacturing highly crystalline silicon dioxide-coated barium titanate powder according to the present invention comprises the steps of: preparing the raw material of barium hydroxide wherein barium (Ba) is ionized by adding materials including silicon (Si) and heating; preparing the raw material of titanium (Ti) dispersed in acid or base; obtaining barium titanate seeds by mixing and reacting the raw materials of barium hydroxide and titanium; grain-growing the barium titanate seeds by mixing the barium titanate seeds with pure water and a grain growth inhibitor; and coating the surfaces of the grain-grown barium titanate seeds with silicon dioxide (SiO_2).