INTERFACE EFFECT ON THE SILVER ION CONDUCTIVITY DURING THE CRYSTALLIZATION OF AGI-AG2O-V2O5 GLASSES

The influence of the microstructural changes during the crystallizatio n in the glassy silver ion conducting system AgI-Ag2O-V2O5 has been st udied by impedance spectroscopy and high temperature XRD. A non-destru ctive procedure has been used for the in situ determination of the gla ss crystal interface area within the forming composites. The variation of the interface area is nearly proportional to the observed anomalou s increase in the conductivity during crystallization, suggesting that an interfacial mechanism is responsible for the conductivity enhancem ent.