Piezoelectric properties of high Curie temperature barium titanate-bismuth perovskite-type oxide system ceramics

Journal of Applied Physics Volume 108 Issue 9 Page 094114-1-094114-5 published_at 2010
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Title ( eng )
Piezoelectric properties of high Curie temperature barium titanate-bismuth perovskite-type oxide system ceramics
Creator
Wada Satoshi
Yamato Keisuke
Pulpan Petr
Kumada Nobuhiro
Lee Bong-Yeon
Iijima Takashi
Source Title
Journal of Applied Physics
Volume 108
Issue 9
Start Page 094114-1
End Page 094114-5
Abstract
Barium titanate (BaTiO3, BT)-bismuth magnesium titanium oxide [Bi(Mg0.5Ti0.5)O-3, BMT] system ceramics were prepared in an ambient atmosphere in order to increase the Curie temperature (T-c) of BT above 132 degrees C. A single perovskite phase was observed for BT-BMT ceramics with BMT compositions less than 50 mol %, and their relative densities were greater than 94%. Synchrotron measured x-ray diffraction patterns revealed that all the cations in the ceramics were homogeneously distributed. The temperature dependence of the dielectric properties revealed that the BT-BMT system ceramics exhibited relaxorlike characteristics with a dielectric maximum temperature as high as 360 degrees C for the 0.5BT-0.5BMT ceramic. The apparent piezoelectric constant (d*) was 60 pC/N for the 0.4BT-0.6BMT ceramic. Based upon these results, the BT-BMT system shows potential as a new type of lead-free material for high T-c piezoelectric applications.
NDC
Physics [ 420 ]
Language
eng
Resource Type journal article
Publisher
The American Institute of Physics
Date of Issued 2010
Rights
Copyright (c) 2010 American Institute of Physics
Publish Type Version of Record
Access Rights open access
Source Identifier
[ISSN] 0021-8979
[DOI] 10.1063/1.3481390
[NCID] AA00693547
[DOI] http://dx.doi.org/10.1063/1.3481390