The Measurement and Characteristics of Absorbing Current of Dielectrics in a Capacitor

The absorbing current of dielectrics in a capacitor is the contribution of slow polarization. It may be measured using time domain parameter method of dielectric spectroscopy. The contribution of every slow polarization mechanism in absorbing current is characterized by a couple of parameters: the component Ca/Cs of which in total polarization and its response time T'. The decay function of absorbing current is exp(t/r') in absence of applied field, but is exp(-t/T) in the presence of field. The results of several typical solid dielectrics are given. Since the decay functions are the same as in discharge and charge of a storage battery, it predicts that the slow polarization is related to particular sort of solid electrochemical reaction.