Effect of Li addition on elastic and structural properties of 35V205-(65-;c)Te02-.xLi20 / Wan Asniza Wan Nasir

Tellurite 35V2O5-(65-x)TeO2-xLi2O:(x=10-50mol%) glass system with reduction of TeC>2 and U2O addition have been prepared by melt-quenching method. Elastic properties together with structural properties of the glasses were investigated by measuring both longitudinal and shear velocities using the pulse-echo-overlap technique at 5MHz and Fourier Transform Infrared (FTIR) spectroscopy, respectively. Ultrasonic velocities(F/, and Vs) independent longitudinal and shear modulus (L and G ),Bulk and Young's modulus (K and G) ,Debye temperature and Poisson's ratio were observed to initially increase atx=20 mol% were suggested due to strengthen of glass network rigidity as a result of BO ions was more dominance compared to NBO ions for this glass composition. Shear, G and Young's, E modulus showed decreasing trend for addition of IAJO at x>20 mol%. FTIR analysis showed an increase in non-bridging oxygen (NBO) as indicated by the increase in intensity of VO4 assigned peaks and the decrease in intensity of Te04 assigned peaks for JC>20 mol% indicates that Li acts as a modifier in the glass network.