60% P2O5– 30%V2O5–10%X where X is Li2O, Na2O, K2O, and BaO glass system were prepared by the melt-quenching technique. The produced glass were checked by x-ray to ensure the glassy state. Glass transition temperature, crystallization temperature, glass thermal stability, glass forming ability and electrical conductivity were measured and calculated. All the above mentioned properties decreases with increasing the ionic radius of the doped oxides. The results suggested the modifier position of the dopped oxides.