Preparation of barium titanate porous ceramics and their sensor properties

Kazuki MAEDA; Ichiro FUJII; Kouichi NAKASHIMA; Gakuyo FUJIMOTO; Kazuhiro SUMA; Toru SUKIGARA; Satoshi WADA

doi:10.2109/jcersj2.121.698

Feature: Evolution of Dielectric Materials II: Papers

Preparation of barium titanate porous ceramics and their sensor properties

Kazuki MAEDA, Ichiro FUJII, Kouichi NAKASHIMA, Gakuyo FUJIMOTO, Kazuhiro SUMA, Toru SUKIGARA, Satoshi WADA

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Keywords: Barium titanate, Porous ceramics, Sensor application, Figure of merit, Nanopore

JOURNAL FREE ACCESS

2013 Volume 121 Issue 1416 Pages 698-701

DOI https://doi.org/10.2109/jcersj2.121.698

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Abstract

Porous barium titanate (BaTiO₃, BT) ceramics were prepared by a conventional sintering method using two kinds of BT particles. The relationship between pore structure (porosity and pore size) of BT ceramics and their sensor properties was investigated. Since a piezoelectric constant d₃₃ of BT depends largely on the pore structures, the microstructure control of porous BT ceramics is important to improve the figure-of-merit of piezoelectric stress sensor application (g₃₃/ρ). In this study, the maximal piezoelectric g₃₃ constant value of 14.8 × 10⁻³ V·m·N⁻¹ and the maximal g₃₃/ρ value of 3.14 × 10³ V·m⁴·N⁻¹·g⁻¹ were obtained at a porosity of approximately 23%.

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