Fabrication of dense <100>-oriented BaTiO₃ ceramics by RTGG method

Abstract

Polycrystalline BaTiO₃ bulk ceramics with a preferred <100>-orientation were fabricated by the reactive templated grain growth method. Green compacts were made by tape-casting of slurry containing plate-like Bi₄Ti₃O₁₂ template particles and BaCO₃ powder. Single phase BaTiO₃ was obtained by calcining the green compacts containing Bi₄Ti₃O₁₂ and BaCO₃ in vacuum. The sintered compacts with a significant grain orientation were obtained, but they contained large pores. The addition of BaTiO₃ with small particle size as a filler increased the sintered density without reducing the degree of grain orientation.