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Abstract
Lithium vanadium-borate glasses with the composition of 0.3Li2O–(0.7-x)B2O3–xV2O5 (x = 0.3, 0.325, 0.35, 0.375, 0.4, 0.425, 0.45, and 0.475) were prepared by melt-quenching method. According to differential scanning calorimetry data, vanadium oxide acts as both glass former and glass modifier, since the thermal stability of glasses decreases with an increase in V2O5 concentration. Fourier transform infrared spectroscopy data show that the vibrations of [VO4] structural units occur at V2O5 concentration of 45 mol%. It is established that the concentration of V4+ ions increases exponentially with the growth of vanadium oxide concentration. Direct and alternative current measurements are carried out to estimate the contribution both electronic and ionic conductivities to the value of total conductivity. It is shown that the electronic conductivity is predominant in the total one. The glass having the composition of 0.3Li2O-0.275B2O3-0.475V2O5 shows the highest electrical conductivity that has the value of 7.4 × 10−5 S cm−1 at room temperature.
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