Dielectric and Piezoelectric Properties of Barium Titanate – Potassium Niobate Nano-structured Ceramics with Artificial MPB Structure

Satoshi Wada; Kenta Yamashita; Ichiro Fujii; Kouichi Nakashima; Nobuhiro Kumada

doi:10.14723/tmrsj.39.113

Regular Papers

Dielectric and Piezoelectric Properties of Barium Titanate – Potassium Niobate Nano-structured Ceramics with Artificial MPB Structure

Satoshi Wada, Kenta Yamashita, Ichiro Fujii, Kouichi Nakashima, Nobuhiro Kumada

著者情報

キーワード: barium titanate, potassium niobate, heteroepitaxial interface, artificial MPB structure, piezoelectric property

ジャーナルフリー

2014 年 39 巻 2 号 p. 113-115

DOI https://doi.org/10.14723/tmrsj.39.113

詳細

抄録

Barium titanate (BaTiO₃, BT) - potassium niobate (KNbO₃, KN) nano-structured ceramics with artificial morphotropic phase boundary (MPB) structure, were successfully prepared by solvothermal method at temperatures below 230 ˚C. Various characterizations suggested that the BT-KN nano-structured ceramics exhibited a porosity of around 30 % and heteroepitaxial interface between BT and KN. Their dielectric and piezoelectric properties were measured at room temperature, and the dielectric constant and apparent piezoelectric constant estimated from slope of strain and electric field curve was 370 and 136 pC/N, respectively.

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