Mechanochemical Synthesis of BaTiO₃ from TiO₂ and BaCO₃

Mechanochemical synthesis of BaTiO₃ from a powder mixture of BaCO₃ and TiO₂ was investigated. An attrition type of milling apparatus was used. It was found that the mechanochemical reaction was strongly dependent on the size combination of the respective two materials. By milling a powder mixture of BaCO₃ (50nm) and TiO₂ (7nm), the single phase BaTiO₃ was synthesized after milling for only 15min. On the other hand, the reaction was not well promoted by the milling of a mixture of BaCO₃ (50nm) and TiO₂ (70nm)