Preparation of Barium Titanate--Potassium Niobate Nanostructured Ceramics with Artificial Morphotropic Phase Boundary Structure By Solvothermal Method

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概要

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• Barium titanate (BaTiO₃, BT)--potassium niobate (KNbO₃, KN) (BT--KN) nanostructured ceramics with a distorted interface region, i.e., artificial morphotropic phase boundary (MPB) structure, were prepared by the solvothermal method. The results of the optimization of reaction conditions showed that the metastable region of only KN crystal growth was obtained using a mixture of KOH and K₂CO₃ as the K source and Nb₂O₅ as the Nb source in ethanol. Moreover, KN formation under the metastable region using a particle compact composed of a mixture of BT and Nb₂O₅ particles as substrates resulted in the successful preparation of BT--KN nanostructured ceramics with an artificial MPB region and a porosity of around 35%. This is the first report on the preparation of ceramics with a heteroepitaxial interface between BT and KN below 230 °C.

• 2011-09-25

著者

• Tanaka Daisuke

  Materials and Process Development Center, TDK Co., Ltd.

• Wada Satoshi

  Interdisciplinary Graduate School of Medical and Engineering, University of Yamanashi

• Kumada Nobuhiro

  Interdisciplinary Graduate School of Medical and Engineering, University of Yamanashi

• KUROIWA Yoshihiro

  Department of Physical Science, Hiroshima University

• Nakashima Kouichi

  Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Kofu 400-8510, Japan

• Fujikawa Yoshinori

  Materials and Process Development Center, TDK Co., Ltd., Narita, Chiba 286-8588, Japan

• FUJII Ichiro

  Interdisciplinary Graduate School of Medical and Engineering, University of Yamanashi

• Yamashita Kenta

  Interdisciplinary Graduate School of Medical and Engineering, University of Yamanashi, Kofu 400-8510, Japan

• Shimizu Shigehito

  Interdisciplinary Graduate School of Medical and Engineering, University of Yamanashi, Kofu 400-8510, Japan

• Furukawa Masato

  Materials and Process Development Center, TDK Co., Ltd., Minamihatori, Narita, Chiba 286-8588, Japan

• NAKASHIMA Kouichi

  Interdisciplinary Graduate School of Medical and Engineering, University of Yamanashi

• Wada Satoshi

  Interdisciplinary Graduate School of Medical and Engineering, University of Yamanashi, Kofu 400-8510, Japan

• Wada Satoshi

  Interdisciplinary Graduate School of Material Science and Technology, University of Yamanashi, 4-3-11 Takeda, Kofu 400-8511, Japan

• Fujikawa Yoshinori

  Materials and Process Development Center, TDK Co., Ltd., Minamihatori, Narita, Chiba 286-8588, Japan

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