| Abstract Scope |
Glasses formed from transition metal oxides have shown tailorable electrical and optical properties depending on the valence state and individual element. Vanadate glasses have received specific attention for their high conductivities as compared to most glass families. In
this study. the frequency-dependent capacitance and dc conductivity properties of alkaline earth vanadate glasses were investigated. Glasses in the xSrO-(100-x)V2O5 and xBaO-(100-x)V2O5 systems, where x = 30, 40, and 50 in mol%, were prepared via melt-quench synthesis. Capacitance measurements were used to calculate dielectric constants, dielectric loss, and ac conductivity while current measurements were evaluated as a function of temperature and voltage for each glass sample. A strong dependence on vanadate ontent was noted where temperature had a less strong effect. Activation energies were calculated to describe electrical transport mechanisms. All samples showed activation energies governed by electron hopping mechanisms. |