Influence of modifier oxides on some physical properties of antimony borate glass system doped with V2O5

Three series of glasses, with the composition 20 MO (M = Ca, Pb, Zn)-40Sb2O3-(40-x)B2O3:xV2O5, with six values of x ranging from 0 to 1 mol% were prepared. The samples were characterised by XRD, SEM, EDS and DSC. The comparison of DSC data among the three series indicated a high glass-forming ability for ZnO mixed glasses. The dielectric properties over a range of frequency and temperature, optical absorption, ESR spectra at room temperature and IR spectra were investigated. The variations observed in all these properties, due to different modifiers as a function of the concentration of V2O5, were analysed in light of different oxidation states and environment of the vanadyl ions in these glasses. The results indicated that the ZnO mixed glasses were more stable against devitrification and possessed high insulating strength when compared with PbO and CaO mixed glasses.