Experimental analysis of distributed dielectric relaxation processes by TSDC techniques

Peaks of thermally stimulated depolarization current of some materials are found experimentally to consist of continuous distributions of relaxation mechanisms. The activation energies and relaxation time constants of these mechanisms are found to be correlated, and therefore univariate distributions may be determined for either parameter. It is assumed that a composite peak consists of a continuous distribution of simple peaks. This is interpreted as the density function of the distribution with respect to peak temperature for the simple peaks. It may be transformed into the density function of either one of the peak parameters, using the relationship between these, established experimentally. The technique was applied to water-in-oil emulsion and hydrated methylcellulose