DIELECTRIC-RELAXATION IN THE LEAD-IRON OXIDE GLASS SYSTEM

The dielectric properties of the PbO-Fe2O3 glassy system are reported in the frequency range 10(2)-10(6) Hz and in the temperature range 300 -500 K. The experimental data have been analyzed in the light of the d ipolar relaxation model. It is observed that this model is consistent with the frequency and temperature dependence of the complex dielectri c constant. The network former PbO influences strongly the dielectric properties, yielding large values of static and high-frequency dielect ric constants and a narrow distribution of relaxation times. (C) 1997 American Institute of Physics.