Growth Process of BaTiO3 Butterfly Crystals
1965 年 20 巻 2 号 p. 264-267
詳細
1965 年 20 巻 2 号 p. 264-267
Growth process of the BaTiO3 butterfly twinned crystals was observed in the region of 1160 to 880°C by stopping the growth at different periods. The process seems to consist of two different ways, namely a relatively rapid two-dimensional growth above 1000°C and a slow thickening one throughout the crystal growth. On the other hand, growth process of the (Ba,Sr)TiO3 butterfly crystals was also observed. The Sr content in the crystal lattice increased below 1000°C, where thickening growth is dominant. Thus the thickening growth of the butterfly crystals also shows different behaviors bounded at 1000°C. These two different growth behaviors probably originate from a large degree of supersaturation above 1000°C and a small one below 1000°C developing in the molten solution of KF-BaTiO3. The explanations for the two growth behaviors seem reasonable referring the solubility data for the KF-BaTiO3 system.
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