Electrical Properties Of Semiconducting Barium Vanadate Glasses Containing Iron Oxide

Electrical conductivity, molar volume and microhardness measurements of some semiconducting barium vanadate glasses doped with iron were carried out and studied. The conduction mechanism is found to be due to small polaron hopping between the different valence states of vanadium ions only and is of nonadiabatic type in its nature. The results showed that the conductivity of the studied glasses does not depend solely on polaron radius and on redox ratio V4+I(V4+ plus V5+) but the network structure plays an important role in affecting the electrical parameters.