Electrical, IR spectroscopy, and DTA studies of some sodium tetraborate glasses containing vanadium oxide

Abstract

The ac electrical conductivity and dielectric constant of semiconductive (Na2B4O7)100‐x(V2O5)x glasses with x = 0.25, 0.5, 1, 2, 3, and 5 mol% have been measured at a constant frequency of 1 kHz in the temperature range from 293 to 600 K. IR spectra of these samples have been recorded at room temperature in the range between 400 and 4000 cm−1. The results showed a broad absorption band with a peak around 3400 cm−1, indicating the presence of a hydroxyl group and the formation of B‐OH within the glass matrix. The addition of V2O5 caused new absorption bands in comparison with the absorption bands obtained for the pure Na2B4O7 glass between 500 and 1800 cm−1. The differential thermal analysis (DTA) was performed for all samples in the temperature range from room temperature to 600 °C.