Domain Size Effect on Dielectric Properties of Barium Titanate Ceramics
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概要
- 論文の詳細を見る
Barium titanate (BaTiO3) ceramics with various grain sizes were prepared by a conventional sintering method and a two-step sintering method. The permittivity of the ceramics increased with decreasing the grain size down to 1.1 μm on average. The BaTiO3 ceramics with an average grain size of 1.1 μm had a high permittivity of 7,700. The transmission electron microscopy (TEM) observation revealed that the 90° domain density increased with decreasing the grain size. The domain size of the ceramics with the highest permittivity of 7,700 was approximately 100 nm. From an ultra wide range dielectric spectroscopy, it was found that the high domain density enhanced the orientational polarizability due to the domain-wall vibration and the ionic polarizability due to the lattice vibration. It was clarified that the increase of the permittivity with decreasing the grain size was due to the domain size effect.
- 2008-09-25
著者
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Li Jianyong
Department Of Biochemistry Virginia Polytechnic Institute And State University
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Kasama Takeshi
Department Of Veterinary Science National Institute Of Infectious Diseases
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Kakemoto Hirofumi
Department Of Applied Physics Faculty Of Science Science University Of Tokyo
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Hoshina Takuya
Department Of Metallurgy And Ceramics Science Tokyo Institute Of Technology
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Tsurumi Takaaki
Department Of Inorganic Materials Faculty Of Engineering Tokyo Institute Of Technology
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Li Jianyong
Department of Metallurgy and Ceramics Science, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8552, Japan
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Takizawa Kayo
Department of Metallurgy and Ceramics Science, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8552, Japan
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Kakemoto Hirofumi
Department of Metallurgy and Ceramics Science, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8552, Japan
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Kasama Takeshi
Department of Materials Science and Metallurgy, University of Cambridge, Cambridge CB2 3QZ, U.K.
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HOSHINA Takuya
Department of Materials Science and Ceramics Science, Graduate School of Science Engineering, Tokyo Institute of Technology
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Hoshina Takuya
Department of Metallurgy and Ceramics Science, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8552, Japan
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Hoshina Takuya
Department of Materials Science and Ceramics Science, Graduate School of Science and Engineering, Tokyo Institute of Technology, Meguro, Tokyo 152-8552, Japan
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