Conductivity Studies of Glasses in the System WO3−P2O5

Abstract

Quenching method was used to obtain glasses in the system xWO₃-(100-x)P₂O₅ (x = 70, 75, 80, 82 mol %). The electrical conductivity of the compositions was examined by a set of electrochemical techniques: impedance spectroscopy, pulse method, and dc method with different electrodes in the temperature range 25–320°C. It was shown that tungsten phosphate glasses are mostly electronic conductors possessing semiconducting properties. It was found that the electrical conductivity of the glasses grows with increasing content of tungsten oxide. The highest conductivity at room temperature (6.7 × 10^-7 S cm⁻¹) is observed for the composition 82WO₃-18P₂O₅.