Effect of V 2O 5 on structure and electrical properties of zinc borate glasses

Abstract

Glasses with the compositions xV 2O 5·(50 − x)ZnO·50B 2O 3 (Series I) and xV 2O 5· (50 − x)B 2O 3·50ZnO (Series II) with (0 ≤ x ≤ 20 mol%) have been prepared using normal melt quench technique. The IR transmission spectra of the glasses have been recorded over the range 400–4000 cm −1. The changes caused by the addition of V 2O 5 on the structure of these glasses have been studied. The values of theoretical optical basicity have also been calculated. The density and molar volume studies indicate that V 2O 5 in these glasses is acting as network modifier in place of network former. Values of the direct current electrical conductivity have been measured from 373 to 623 K and the activation energy has been calculated. The variations in density, molar volume and electrical conductivity with V 2O 5 content have been discussed in terms of changes in the glass structure.