The Growth of BaTiO3 Crystals and The Research on Crystal Defects of Them by Electro-microscope Technique

BaTiO3 crystals are very useful as an excellent photorefractive materials. But the growth of BaTiO3 crystals is very difficult due to some special chemical and physical properties of them. The BaTiO3 crystals in good optical quality have been grown successfully by Top Seed Solution Growth (TSSG) technique but the crystal defects happened easyly due to the unsuitable in the crystal growth conditions even just a little. The temperature distribution near the crystal growth front, the suitable seeding temperature, stabilyty of the growth interface and so on are very important to keep the crystal growth well and in good optical quality. All of these main conditions for growing of crystals were researched detailly in our experiments and discussed detailly in this paper.