Fabrication of Textured Ceramics Using Mn and Nb-doped Hexagonal BaTiO3 by an Electrophoretic Deposition in a High Magnetic Field

Eigo Kobayashi; Shintaro Ueno; Kouichi Nakashima; Nobuhiro Kumada; Tohru S. Suzuki; Tetsuo Uchikoshi; Yoshio Sakka; Yasunari Miwa; Shinichiro Kawada; Suetake Omiya; Noriyuki Kubodera; Ichiro Fujii; Satoshi Wada

doi:10.14723/tmrsj.39.199

Regular Papers

Fabrication of Textured Ceramics Using Mn and Nb-doped Hexagonal BaTiO₃ by an Electrophoretic Deposition in a High Magnetic Field

Eigo Kobayashi, Shintaro Ueno, Kouichi Nakashima, Nobuhiro Kumada, Tohru S. Suzuki, Tetsuo Uchikoshi, Yoshio Sakka, Yasunari Miwa, Shinichiro Kawada, Suetake Omiya, Noriyuki Kubodera, Ichiro Fujii, Satoshi Wada

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Keywords: ferroelectric, barium titanate, grain-orientation, electrophoretic deposition, magnetic orientation

JOURNAL FREE ACCESS

2014 Volume 39 Issue 2 Pages 199-202

DOI https://doi.org/10.14723/tmrsj.39.199

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Abstract

(111)-oriented Mn and Nb-doped barium titanate (BaTiO₃, BT) ceramics with fine grains were fabricated with an electrophoretic deposition (EPD) method in a high magnetic field and a topotactic phase transition. Initially, accumulations of (0001)-oriented hexagonal Ba(Ti_0.95Mn_0.05)O₃ particles added with 2.5 mol%-Nb₂O₅ powder were prepared by the EPD method in the high magnetic field of 12 T. Then, the (111)-oriented, Mn and Nb-doped pseudo-cubic BT ceramics with fine grains of ～0.4 µm in diameter were obtained via the topotactic phase transition, with the degree of the (111) orientation being as high as 79 %. The piezoelectric properties of the oriented ceramics were also studied.

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