고상법에 의한 100 nm BaTiO₃ 분말의 합성

BaTiO₃ powder was synthesized by the solid-state reaction of fine BaCO₃ and TiO₂ raw materials. Fine grinding media of 50 and 300 microns were used for obtaining fine particulate mixture of BaCO₃ and TiO₂ with high homogeneity. Effect of the size of grinding media on the synthesis mechanism of BaTiO₃ was discussed on the basis of the particulate morphology and thermogravimetry data for the mixture powders. By using the finer grinding media, BaTiO₃ was formed at the lower temperature and the particle size with the relatively narrower distribution could be obtained. BaTiO₃ powder with the average size of 100 nm was synthesized by the solid reaction in vacuum atmosphere.