The Dielectric and Piezoelectric Properties of KNbO3 / BaTiO3 Composites With A Wide BaTiO3 Size Distribution

Ichiro Fujii; Kenta Yamashita; Kouichi Nakashima; Nobuhiro Kumada; Eisuke Magome; Chikako Moriyoshi; Yoshihiro Kuroiwa; Satoshi Wada

doi:10.14723/tmrsj.38.57

Regular Papers

The Dielectric and Piezoelectric Properties of KNbO₃ / BaTiO₃ Composites With A Wide BaTiO₃ Size Distribution

Ichiro Fujii, Kenta Yamashita, Kouichi Nakashima, Nobuhiro Kumada, Eisuke Magome, Chikako Moriyoshi, Yoshihiro Kuroiwa, Satoshi Wada

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Keywords: barium titanate, potassium niobate, solvothermal synthesis

JOURNAL FREE ACCESS

2013 Volume 38 Issue 1 Pages 57-60

DOI https://doi.org/10.14723/tmrsj.38.57

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Abstract

KNbO₃ (KN) / BaTiO₃ (BT) composites with heteroepitaxial interfaces were solvothermally synthesized using the barium titanate powder with a wide particle size distribution. Compared with the composites prepared with a narrow particle size distributions, the relative density increased to 68 - 80 %. The dielectric constant was increased to 300 - 450, while an obvious increase in the electric-field-induced strain was not observed. The dielectric and piezoelectric properties were maximized at the KNbO₃ / BaTiO₃ molar ratio of 0.5.

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