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Development of perovskite structure and electrical properties of Pb(Zr1/2Ti1/2)O3-Pb(Ni1/3Nb2/3)O3 system

Published online by Cambridge University Press:  17 June 2010

B.-J. Fang ,
Q.-B. Du ,
L.-M. Zhou ,
Y.-H. Shen  and
J. Wang
B.-J. Fang*
Affiliation:
School of Materials Science and Engineering, Changzhou University, Changzhou, Jiangsu, 213164, P.R. China
Q.-B. Du
Affiliation:
School of Materials Science and Engineering, Changzhou University, Changzhou, Jiangsu, 213164, P.R. China
L.-M. Zhou
Affiliation:
School of Materials Science and Engineering, Changzhou University, Changzhou, Jiangsu, 213164, P.R. China
Y.-H. Shen
Affiliation:
School of Materials Science and Engineering, Changzhou University, Changzhou, Jiangsu, 213164, P.R. China
J. Wang
Affiliation:
School of Materials Science and Engineering, Changzhou University, Changzhou, Jiangsu, 213164, P.R. China
*
fangbj@cczu.edu.cn
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Abstract

Phase pure perovskite structure (1-x)Pb(Zr1/2Ti1/2)O3-xPb(Ni1/3Nb2/3)O3 (PZT-PNN, x = 0.05-0.40) ferroelectric ceramics were prepared by conventional solid-state reaction method via the columbite precursor technique. The PZT-PNN ceramics sintered at 1225 °C for 2 h exhibit rather homogenous microstructure and high relative density. With the increase of the Pb(Ni1/3Nb2/3)O3 (PNN) content, the crystal structure of PZT-PNN changes gradually from tetragonal perovskite structure to rhombohedral one, where the morphotropic phase boundary (MPB) composition locates at a region of x = 0.15-0.20 determined by X-ray diffraction (XRD) and dielectric measurements. Furthermore, the dielectric response peaks of PZT-PNN also changes from narrow, sharp and almost frequency independent peaks of normal ferroelectrics to broad, diffused and apparent frequency dependent peaks of relaxor ferroelectrics, accompanied by the decrease of the temperature of dielectric maximum (Tm) with the increase of the PNN content. PZT-PNN with the MPB composition exhibits integral excellent electrical properties, where 0.80PZT-0.20PNN exhibits the maximum value of dielectric constant εm 26750 at 280.6 °C, the remanent polarization Pr is 25.17 µC/cm2, coercive field Ec is 5.82 kV/cm, and piezoelectric constant d33 reaches 281 pC/N.

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 51 , Issue 1 , July 2010 , 10301
Copyright
© EDP Sciences, 2010

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