Dielectric constant epsilon', loss tan delta and ac conductivity sigma of Z
nF2-Bi2O3-TeO2 glasses with varying concentrations of Bi2O3 (from 5 to 20%)
are studied as a function of frequency and temperature over moderately wid
e ranges. The dielectric breakdown strength for these glasses is also deter
mined in air medium. From the analysis of these studies along with the IR s
pectra & DTA recordings of these glasses, the structural changes in ZnF2-Bi
2O3-TeO2 glass system with change in the concentration of Bi2O3, are discus
sed. (C) 2001 Kluwer Academic Publishers.