Structural and physical properties of vanadium doped copper bismuth borate glasses

The structural and physical properties of xCuO(30-x)Bi₂O₃-70B₂O₃; x = 0, 5, 10, 15, 20 & 25 mol % with 2 mol % V₂O₅ glasses prepared by normal melt quench technique have been investigated by means of FT-IR & physical measurement techniques. With the addition of copper oxide (x ≤ 10 mol%), the frequency bands in the higher region shift towards lower wave number, suggest the conversion of BO₃ to BO₄ structural units, which in turn give rise to the formation of Non Bridging Oxygen's (NBOs). For further increase in CuO (i.e. for x ≥ 10 mol %), the frequency bands shift towards higher wave number, indicate the formation of Bridging Oxygen's (BOs). The FTIR analysis reveals that the present glass system is based on the BiO₃ pyramidal, BiO₆ octahedral units and also on BO₃ and BO₄ structural units. The systematic variation in density and molar volume in these glasses indicates the effect of CuO substitution.