Equivalent circuit model of a PbZr0.6Ti0.4O3 ceramic using impedance spectroscopy

The ceramic system PbZr0.6Ti0.4O3 was prepared by a solid state method and impedance measurements were carried out as a function of frequency (100 Hz-10 MHz) in the temperature range 370 K-869 K. Equivalent circuit models that represent the data below and above the transition temperature were arrived at by comparing the experimental plots with the computer-simulated behavior obtained for model circuits. Below the transition temperature the equivalent circuit model comprises a series LCR combination connected in series with a parallel RC network where as for higher temperatures it contains three parallel RC circuits connected in series. Variation of the values of the components as a function of temperature was also studied.