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Dielectric and Piezoelectric Properties of Gd-modified (1-x) BiFeO3-xPbTiO3 Ceramics with a Morphotropic Phase Boundary

Published online by Cambridge University Press:  10 April 2013

Dalei Wang ,
Shundong Bu ,
Guoxi Jin ,
RuiDai ,
Dengren Jin  and
Jinrong Cheng
Dalei Wang
Affiliation:
School of materials science and engineering, Shanghai University, Shanghai 200072, P.R.China
Shundong Bu
Affiliation:
School of materials science and engineering, Shanghai University, Shanghai 200072, P.R.China
Guoxi Jin
Affiliation:
School of materials science and engineering, Shanghai University, Shanghai 200072, P.R.China
RuiDai
Affiliation:
School of materials science and engineering, Shanghai University, Shanghai 200072, P.R.China
Dengren Jin
Affiliation:
School of materials science and engineering, Shanghai University, Shanghai 200072, P.R.China
Jinrong Cheng*
Affiliation:
School of materials science and engineering, Shanghai University, Shanghai 200072, P.R.China
*
*corresponding author: jrcheng@shu.edu.cn
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Abstract

(1-x)(Bi0.8Gd0.2)FeO3-xPbTiO3 (BGF-PT) solid solutions ceramics of x=0.55,0.50,0.4975, 0.49 and 0.45 were prepared by the mixed oxide method. Gd3+ of 20 at% was introduced into the Bi3+ site to improve the dielectric and piezoelectric properties of BFPT without causing the significant reduction of Curie temperature (Tc). X-ray diffraction analysis shows a transformation from the tetragonal (T) to rhombohedral (R) phase with the increase of BGF content. The morphotropic phase boundary was determined by measuring the dielectric and piezoelectric properties of BGF-PT within a wide composition range. BGF-PT for x=0.4975 shows the coexistence of T and R phases with the dielectric constant and loss of about 895 and 0.031 respectively at the frequency of 102 Hz.

Keywords

dielectricferroelectricpiezoelectric
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1507: Symposium AA – Oxide Nanoelectronics and Multifunctional Dielectrics , 2013 , mrsf12-1507-aa09-22
Copyright
Copyright © Materials Research Society 2013

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