Microstructure Analysis of Solid-State Reaction in Synthesis of BaTiO3 Powder Using Transmission Electron Microscope
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概要
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The kinetics and mechanism of the solid-state reaction in BaTiO3 powder synthesis were investigated microstructurally. An equimolar mixture of BaCO3 and TiO2 (rutile) powders calcinated at 600 and 800 °C in air was observed by using transmission electron microscopy (TEM). During the reaction, layered BaTiO3 was formed over the TiO2 particles with a structurally and compositionally sharp interface. The crystallographic orientation relationship between TiO2 and BaTiO3 was universally observed as $[001]_{\text{TiO\scale70%$_{2}$}}\varparallel[1\bar{1}0]_{\text{BTO}}$, $(100)_{\text{TiO\scale70%$_{2}$}}\varparallel(111)_{\text{BTO}}$. The perovskite phase BaTiO3 was formed by inward diffusion of barium and oxygen ions into the rutile lattice, maintaining a topotaxial relationship with the rutile structure.
- 2008-04-25
著者
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Mizuno Youichi
Material Development Department Taiyo Yuden Co. Ltd.
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Kobayashi Keisuke
Nims Beamline Station Spring-8 National Institute For Material Science
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Kobayashi Keisuke
Material Development Department, Taiyo Yuden Co., Ltd., 5607-2 Nakamuroda, Takasaki, Gunma 370-3347,
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Suzuki Toshimasa
Material Development Department, Taiyo Yuden Co., Ltd., 5607-2 Nakamuroda, Takasaki, Gunma 370-3347,
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Suzuki Toshimasa
Material Development Department Taiyo Yuden Co. Ltd.
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