Electrical conductivity of barium borate glasses containing mixed transition metal oxides

Abstract

The resistivities and activation energies of borate glasses containing oxides of both V and Fe, and both V and Cu are lower than those of glasses containing the same amounts of each TM oxide separately. Optical and ESR spectra suggest that the proportions of ions in reduced valence states are not greatly affected by mixing the oxides. It is concluded that polaron-hopping between ions of different TM elements occurs readily in these mixed glasses.