Dielectric dispersion in ZnF2-Bi2O3-TeO2 glass system

Dielectric constant , loss tan and ac conductivity of ZnF₂-Bi₂O₃-TeO₂ glasses with varying concentrations of Bi₂O₃ (from 5 to 20%) are studied as a function of frequency and temperature over moderately wide ranges. The dielectric breakdown strength for these glasses is also determined in air medium. From the analysis of these studies along with the IR spectra & DTA recordings of these glasses, the structural changes in ZnF₂-Bi₂O₃-TeO₂ glass system with change in the concentration of Bi₂O₃, are discussed.