Fabrication of 〈111〉-oriented BaTiO3 ceramics by high magnetic field electrophoretic deposition using hexagonal-tetragonal co-existing BaTiO3 powder

Hari Shankar MALLIK; Ichiro FUJII; Gopal Prasad KHANAL; Sangwook KIM; Shintaro UENO; Tohru S. SUZUKI; Satoshi WADA

doi:10.2109/jcersj2.20013

Feature: Cutting edge research on electroceramics 2019: Full papers

Fabrication of 〈111〉-oriented BaTiO₃ ceramics by high magnetic field electrophoretic deposition using hexagonal-tetragonal co-existing BaTiO₃ powder

Hari Shankar MALLIK, Ichiro FUJII, Gopal Prasad KHANAL, Sangwook KIM, Shintaro UENO, Tohru S. SUZUKI, Satoshi WADA

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Keywords: Barium titanate, Electrophoretic deposition, Crystalline oriented ceramics, High magnetic field, Piezoelectric properties

JOURNAL FREE ACCESS

2020 Volume 128 Issue 8 Pages 469-474

DOI https://doi.org/10.2109/jcersj2.20013

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Abstract

⟨111⟩-oriented BaTiO₃ (BT) ceramics were prepared by a high magnetic field assisted electrophoretic deposition method using hexagonal-tetragonal co-existing BT powders. With increasing the hexagonal content, the ⟨111⟩-orientation factor increased, while piezoelectric strain constant d^*₃₃ increased up to the hexagonal content of 80% with attaining a maximum value of 627 pm V⁻¹ and then rapidly decreased. In contrast, the decreasing trend of d^*₃₃ with increasing hexagonal content in the randomly oriented ceramics was observed. These results were discussed with the degree of the orientation and the possible twin defects in the BT ceramics.

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