Various glasses in this system were investigated, and the effects of an increasing PbF2 content upon properties such as the glass transition temperature, thermal expansion, microhardness and conductivity were determined. It was found that the addition of PbF2 to the network could increase the conductivity by increasing both the carrier concentration and the mobility. The activation energy for conduction was found to decrease upon increasing the PbF2 content. The decrease in activation energy, with increasing PbF2 content, was explained in terms of a modification of the channel network. Such modifications included expanding, opening and weakening the bonds which made up the skeleton of the glass. The opened-up structure of the network was found to have a direct effect upon the ionic conduction of the glasses. The conductivity was enhanced by more than 7 orders of magnitude upon adding 50mol%PbF2. The random site model was used to explain the F-ion transport mechanism in the glasses.

Transport Behavior of PbO-PbF2-TeO2 Glasses. G.El-Damrawi: Physica Status Solidi A, 2000, 177[2], 385-92