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Effect of Mg Content on Phase Structure and Electrical Properties of (Ba0.97Ca0.03)(Ti0.96-xZr0.04Mgx)O3 Ceramics

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Abstract:

The Mg-doped (Ba0.97Ca0.03)(Ti0.96-xZr0.04Mgx)O3 piezoelectric ceramics were prepared by conventional sintering technique. Influences of MgO doping content on the phase structure and dielectric, piezoelectric, and ferroelectric properties were investigated. The XRD patterns suggested that a morphotropic phase boundary (MPB) crossing pseudocubic and tetragonal symmetries occurs at the compositions containing 0.5~0.7 at.% Mg. Because of such transitional behavior, the piezoelectric coefficient (d33), electromechanical coupling coefficient (kp), and remanent polarization (Pr) were enhanced to peak values, 327 pC/N, 37.2%, and 15.79 μC/cm2, respectively. However, the dielectric constant (εr) showed a decreasing tendency with raising Mg content.

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Periodical:

Advanced Materials Research (Volumes 1061-1062)

Pages:

79-82

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1061-1062.79

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Online since:

December 2014

Authors:

Gao Lei Zhao*, Da Xue Zhao, Shi Ming Li

Keywords:

Dielectric Property, Mg-Doped, Phase Transition, Piezoelectric Properties

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© 2015 Trans Tech Publications Ltd. All Rights Reserved

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