Preparation of barium titanate–potassium niobate ceramics using interface engineering and their piezoelectric properties

Satoshi WADA; Shigehito SHIMIZU; Petr PULPAN; Nobuhiro KUMADA; Daisuke TANAKA; Masahito FURUKAWA; Chikako MORIYOSHI; Yoshihiro KUROIWA

doi:10.2109/jcersj2.118.691

Feature: Evolution of Dielectric Materials: Papers

Preparation of barium titanate–potassium niobate ceramics using interface engineering and their piezoelectric properties

Satoshi WADA, Shigehito SHIMIZU, Petr PULPAN, Nobuhiro KUMADA, Daisuke TANAKA, Masahito FURUKAWA, Chikako MORIYOSHI, Yoshihiro KUROIWA

Author information

Satoshi WADA
Material Science and Technology, Interdisciplinary Graduate School of Medical and Engineering, University of Yamanashi
Shigehito SHIMIZU
Material Science and Technology, Interdisciplinary Graduate School of Medical and Engineering, University of Yamanashi
Petr PULPAN
Material Science and Technology, Interdisciplinary Graduate School of Medical and Engineering, University of Yamanashi
Nobuhiro KUMADA
Material Science and Technology, Interdisciplinary Graduate School of Medical and Engineering, University of Yamanashi
Daisuke TANAKA
Materials and Process Development Center, TDK Co., Ltd.
Masahito FURUKAWA
Materials and Process Development Center, TDK Co., Ltd.
Chikako MORIYOSHI
Department of Physical Science, Hiroshima University
Yoshihiro KUROIWA
Department of Physical Science, Hiroshima University

Keywords: Barium titanate, Potassium niobate, Interface region, Piezoelectric property, Interface engineering

JOURNAL FREE ACCESS

2010 Volume 118 Issue 1380 Pages 691-695

DOI https://doi.org/10.2109/jcersj2.118.691

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Abstract

Barium titanate (BaTiO₃, BT)–potassium niobate (KNbO₃, KN) solid solution system (0.5BT–0.5KN) ceramics with various microstructures were prepared by two-step sintering method, and their piezoelectric properties were investigated. For 0.5BT–0.5KN ceramics, two phases, ferroelectric tetragonal and ferroelectric orthorhombic, coexisted in different grains at room temperature, owing to the limited solid solution system. The volume fraction of interface region between BT-rich tetragonal and KN-rich orthorhombic grains was controlled by sintering temperatures, and increased with decreasing sintering temperatures. Apparent piezoelectric constant d₃₃^* was measured using slope of strain vs. electric field curves. As the results, the d₃₃^* increased with decreasing sintering temperatures, which revealed that interface region between tetragonal and orthorhombic grains could contribute to enhancement of piezoelectric properties.

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