Preparation of ?110?-Textured BaTiO3Ceramics by the Reactive-Templated Grain Growth Method Using Needlelike TiO2Particles

Dense, highly 〈110〉-textured BaTiO3 ceramics were prepared by the reactive-templated grain growth method. Needlelike TiO2 (rutile) particles with their needle axis parallel to 〈001〉 were used as reactive template particles. Slurry containing an equimolar mixture of TiO2 and BaCO3 was tape cast to form a green compact, in which TiO2 particles were aligned with their needle axis parallel to the casting direction. Calcination of the green compact changed TiO2 particles into BaTiO3 grains with their 〈110〉 direction parallel to the casting direction, for which the topotaxial relation ofwas responsible. Sintering yielded a dense, highly textured BaTiO3 compact.