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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.118  No.1380 (August) (2010)  >  pp.691-695

Journal of the Ceramic Society of Japan
<<Previous article Vol.118  No.1380 (August) (2010)   pp.691 - 695 Next article>>

Preparation of barium titanate–potassium niobate ceramics using interface engineering and their piezoelectric properties

Satoshi WADA1), Shigehito SHIMIZU1), Petr PULPAN1), Nobuhiro KUMADA1), Daisuke TANAKA2), Masahito FURUKAWA2), Chikako MORIYOSHI3) and Yoshihiro KUROIWA3)
1) Material Science and Technology, Interdisciplinary Graduate School of Medical and Engineering, University of Yamanashi
2) Materials and Process Development Center, TDK Co., Ltd.
3) Department of Physical Science, Hiroshima University


  Barium titanate (BaTiO3, BT)–potassium niobate (KNbO3, KN) solid solution system (0.5BT–0.5KN) ceramics with various microstructures were prepared by two-step sintering method, and their piezoelectric properties were investigated. For 0.5BT–0.5KN ceramics, two phases, ferroelectric tetragonal and ferroelectric orthorhombic, coexisted in different grains at room temperature, owing to the limited solid solution system. The volume fraction of interface region between BT-rich tetragonal and KN-rich orthorhombic grains was controlled by sintering temperatures, and increased with decreasing sintering temperatures. Apparent piezoelectric constant d33* was measured using slope of strain vs. electric field curves. As the results, the d33* increased with decreasing sintering temperatures, which revealed that interface region between tetragonal and orthorhombic grains could contribute to enhancement of piezoelectric properties.


Keyword:
Barium titanate, Potassium niobate, Interface region, Piezoelectric property, Interface engineering

Received: May 06, 2010
Accepted: July 15, 2010 , Published online: August 01, 2010
Copyright (c) 2010 The Ceramic Society of Japan

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