Fabrication of (111)-oriented Tetragonal BaTiO3 Ceramics by an Electrophoretic Deposition in a High Magnetic Field

Eigo Kobayashi; Shintaro Ueno; Kouichi Nakashima; Nobuhiro Kumada; Tohru S. Suzuki; Tetsuo Uchikoshi; Yoshio Sakka; Ichiro Fujii; Satoshi Wada

doi:10.14723/tmrsj.40.223

Regular Papers

Fabrication of (111)-oriented Tetragonal BaTiO₃ Ceramics by an Electrophoretic Deposition in a High Magnetic Field

Eigo Kobayashi, Shintaro Ueno, Kouichi Nakashima, Nobuhiro Kumada, Tohru S. Suzuki, Tetsuo Uchikoshi, Yoshio Sakka, Ichiro Fujii, Satoshi Wada

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

JOURNAL FREE ACCESS

2015 Volume 40 Issue 3 Pages 223-226

DOI https://doi.org/10.14723/tmrsj.40.223

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Abstract

(111)-oriented tetragonal barium titante (BaTiO₃, BT) ceramics with the degree of (111) orientation of 100 % were fabricated by sintering (001)-oriented hexagonal BT accumulations prepared by a magnetic field assisted electrophoretic deposition (EPD) method. Apparent piezoelectric constant d₃₃* value calculated from the slope of a unipolar strain vs. electric field curve of the (111)-oriented tetragonal BT ceramics was 597 pm/V, which was larger than that of randomly oriented ceramics (d₃₃* = 460 pm/V). This enhancement was associated with an electric field induced phase transition.

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