首页|Enhanced Piezoelectric Properties of Barium Titanate-Potassium Niobate Solid Solution System Ceramics by MPB Engineering

Enhanced Piezoelectric Properties of Barium Titanate-Potassium Niobate Solid Solution System Ceramics by MPB Engineering

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  • NETL
  • NSTL
  • Trans Tech Publications Ltd
Barium titanate (BaTiO_3, BT) - potassium niobate (KNbO_3, KN) solid solution system (0.5BT-0.5KN) ceramics with various microstructures were prepared by conventional sintering method and two-step sintering method using BT and KN nanoparticles. Their microstructures were investigated using X-ray diffraction (XRD) measurement and scanning electron microscopy (SEM), and it was confirmed that two ferroelectric phases, i.e., BT-rich tetragonal and KN-rich orthorhombic phases, always coexisted for all ceramics, which suggested that 0.5BT-0.5KN ceramics had "pseudo-morphotropic phase boundary (MPB)" structure. Thus, the control of the interface area between two phases was important to enhance piezoelectric property. Finally, their piezoelectric property was measured, and the apparent piezoelectric constant d_(33)~* increased with increasing interface area.

barium titanatepotassium niobateinterface regionpiezoelectric propertyMPB engineering

Shigehito Shimizu、Petr Pulpan、Nobuhiro Kumada、Daisuke Tanaka、Masahito Furukawa、Yoshihiro Kuroiwa、Tohru Suzuki、Tetsuo Uchikoshi、Satoshi Wada

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Material Science and Technology, Interdisciplinary Graduate School of Medical and Engineering, University of Yamanashi, 4-4-37 Takeda, Kofu, Yamanashi 400-8510, Japan

Materials Process Development Center, TDK Co., Ltd., 570-2 Matsushita, Minamihatori, Narita, Chiba 286-8588, Japan

Department of Physical Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan

National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan

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2010

10.4028/www.scientific.net/KEM.445.11

Key engineering materials

Key engineering materials

ISSN：1013-9826
年,卷(期)：2010.445
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