Electrical properties of AgI–Ag2O–V2O5–P2O5 glasses

Mixed conductive silver vanadate-phosphate glasses were prepared and their electrical properties were studied. Compositions of the glasses were characterized by parameters: x (AgI content) and r=[Ag2O]/[V2O5 + P2O5]. Total conductivity *st (x, r = constant) of a series of samples with fixed r values exhibited minima when plotted vs. x. The conductivity minima were accompanied by maxima of apparent activation energy Et (x, r=constant). The observed dependencies were attributed to the ion-polaron effect (IPE), i.e. to electrostatic attraction between mobile species: electrons (polarons) and Ag+ ions.