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Preparation of Potassium Niobate-Coated Barium Titanate Accumulation Ceramics by Solvothermal Synthesis and Enhancement of Piezoelectric Property

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Abstract:

Barium titanate (BaTiO3, BT) - potassium niobate (KNbO3, KN) nanostructured ceramics with artificial morphotropic phase boundary (MPB) structure were successfully prepared at temperatures below 230 °C by solvothermal method. Various characterizations suggested that the BT-KN nanostructured 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 pm/V, respectively.

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Periodical:

Key Engineering Materials (Volume 566)

Pages:

76-80

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.566.76

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Online since:

July 2013

Authors:

Kenta Yamashita, Shigehito Shimizu, Nobuhiro Kumada, Kouichi Nakashima, Ichiro Fujii, Yoshihiro Kuroiwa, Satoshi Wada

Keywords:

Artificial MPB Structure, Barium Titanate (BT), Heteroepitaxial Interface, Piezoelectric Properties, Potassium Niobate

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