Dielectric relaxation and electric conductivity: Modelling and time domain measurements

In a previous paper (ICSD 2010 Potsdam) we proposed a theoretical model to highlight the appearance of the dipolar relaxation and the appearance of the electrical conductivity in dielectric materials. For this we used spectroscopic techniques in time domain we recall very briefly below. In this paper we verify the proposed model with experimental results which seem to be in agreement We also recall that our model is based on the assumption that migration of charges gives rise to dielectric losses due to the conductivity while dipole orientation gives rise to dielectric losses by relaxation process that is a result of the dipole alignment in the applied field direction. We used samples that have same appearance in their dipole relaxation but differ on their conductive behavior and vice versa in the case where samples are characterized by the same conductive appearance but differ in their mode of relaxation.