Thermally stimulated discharge conductivity study of zinc oxide thermoelectrets

Abstract

The dc electrical conductivity of ZnO nanoparticles and its thermoelectrets have been studied in the present paper. Thermal stability of ZnO nanoparticles has been investigated by DSC. The thermoelectrets were prepared by polarizing the sample by applying different polarizing fields (E_P) at constant polarizing temperature (T_P) for constant polarization time (t_p). The thermally stimulated discharge current (TSDC) studies have been made on ZnO sample at a constant heating rate in the temperature region 313-473 K. It has been observed that the conductivity of ZnO nanoparticles has been increased with increase in temperature and field. The thermograms are plotted between log σ and temperature (10³/T). The dependence of TSDC data on polarizing agents i.e. field and temperature is explained on the basis of theoretical predictions.