Efekt elektretowy w cyrkonianie ołowiu

Abstract

Thermoelectre properties were induced in polycryslatalline PbZrO[3]. The thermal depolarization method was applied to the charge evalation absorbed in the process of electret forming. Measurements were carried out near the phase change points /180°С - 280°C/. The thermoelectret was depolarized either in the polarization temperature or above this temperature. The evidence of the polarization on temperature is given. The cooling rate does not influence polarization. Depolarization current /analyzed after temperature of thermoelectret depolarization is stabilized/ has two exponentially decaying components. Relaxation time values of the corresponding current components for given temperature, measured with use of thermoelectret and discharge current methods are equal. Electret polarization value does not depend on the rate of depolarization and the depolarization temperature. The relaxation time of depolarization current components depends on the temperature of thermoelectret depolarization process.