Abstract

Glass composition with the formula 75TeO2 - (24-x) MoO3 - xLi2O −1V2O5 where x varying from 0 mol% to 24 mol% in steps of 6 mol% is synthesized using melt quenching technique. Density, molar volume along with OPD were determined. To understand the structural characteristics Fourier Transform Infrared (FTIR), Raman techniques were used. Transformations of TeO4 (tbp) to TeO3+1 and then to TeO3 (tp) units was observed and the change in ligancy of Mo from +4 to +6 shows that there is a reduction in the number of oxygen dangling bonds with rise in Li2O in the glass network was revealed by Raman and FTIR studies. Thermal properties like glass transition temperatures and its resistance to degradation of ductility and toughness were evaluated by DSC and also the effect of Li2O and MoO3 on these properties was presented. UV–VIS spectroscopic technique is employed for determining optical parameters of the TML samples. Spin Hamiltonian parameters are also evaluated by analyzing EPR spectroscopy which revealed that VO2+ ion exists in octahedral site in the glass matrix with tetragonal distortion.

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