Effect of Zr concentration on conductivity behavior of (1−x)PMN-xPZ ceramic: An impedance spectroscopy analysis

Abstract

Impedance spectroscopy study was carried out on Pb[Mg(1−x)/3Nb2(1−x)/3Zrx]O3 for x=0.10, 0.20, and 0.30 in the frequency range 100 Hz–1 MHz and temperature range 498–723 K. The activation energies obtained for the conduction increase with an increase in Zr4+ content. A significant decrease in the electrical conductivity was observed by an increase in Zr4+ substitution. The conduction mechanism in PMN-PZ is attributed to the migration of doubly ionized oxygen vacancies. These results are explained in terms of lowering the structural disorder in PMN by Zr4+ substitution.