Dielectric relaxation in zinc-borotellurite glasses doped with alkali, transition and rare earth oxides

Abstract

Abstract A batch of zinc borotellurite glasses doped with Li2O, W2O3 and rare earth ions were synthesized with varied composition and investigated for dielectric properties in the frequency range from 50Hz to 15MHz and temperature from 300K to 620K. Electric moduli and impedance were estimated. Dielectric relaxation time from both impedance and moduli data were determined. Activation energy for relaxation time has been determined. Nature of the phase of the glasses has been understood in terms of cole-cole plots. Normalized moduli plots were made to learn temperature dependance of relaxation processes. For the first time, glasses of the present composition have been exposed for detailed dielectric relaxation studies.