Fabrication of Barium Titanate Single Crystals by Solid‐State Grain Growth

BaTiO 3 single crystals were prepared by solid‐state grain growth. The single crystals were obtained by seeding a poly‐crystalline, TiO 2 ‐excess BaTiO 3 , 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 TiO 2 ‐excess BaTiO 3 , which is about 1300°C.