FABRICATION OF BARIUM-TITANATE SINGLE-CRYSTALS BY SOLID-STATE GRAIN-GROWTH

BaTiO3 single crystals were prepared by solid-state grain growth. The single crystals were obtained by seeding a polycrystalline, TiO2-excess BaTiO3, which exhibited abnormal grain growth. The condition for single-crystal growth was essentially dependent on the grain growth behavior of the polycrystalline, sintered bodies. The annealing temperature suitable for the single-crystal growth was just below the critical temperature of abnormal grain growth in TiO2-excess BaTiO3, which is about 1300-degrees-C.