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Published in:
22-06-2017
High temperature dielectric anomaly and impedance analysis of (Pb1−3x/2La x )(Zr0.95Ti0.05)O3 ceramics
Published in: Journal of Materials Science: Materials in Electronics | Issue 19/2017
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Abstract
(Pb1−3x/2La
x
)(Zr0.95Ti0.05)O3 (x = 0.02, 0.04, 0.06, 0.08, 0.10) ceramics were successfully synthesized by a solid state mixed oxide technique. Structural information was investigated by X-ray diffraction method. Dielectric permittivity versus temperature demonstrated the phase transition temperature (AFE-FE and FE-PE) reduced with substituting of Pb2+ by La3+. The impedance analysis of (Pb1−3x/2La
x
)(Zr0.95Ti0.05)O3 ceramics were found to obey an Arrhenius law with activation energy of 0.43–1.61 eV, and the conduction was a thermally activated process with activation energy 0.38–1.66 eV, respectively. Based on these results, the activation energy for anomaly and conduction was calculated, which suggested the oxygen vacancy play a critical role in the dielectric anomaly process of (Pb1−3x/2La
x
)(Zr0.95Ti0.05)O3 ceramics at high temperatures.