Abstract
(100-X-Y)TeO2-XLi2O-YZnO, X = 10, 15 and 20, Y = 0, 5, 10, 15, 20, 25 and 30 mol%, glasses have been prepared by the melt quenching technique. Density and molar volume have been identified for every glass sample. Differential Scanning Calorimetry (DSC), optical absorption in the ultraviolet–visible region, Raman spectroscopy and linear refractive index have been achieved. DSC results show a considerable increase in glass stability with the replacement of TeO2 by ZnO. The Band Gap energy, determined from UV-VIS results, gradually increases in all set of samples. The Raman spectroscopy results confirm a structural change: with the increase of ZnO content (until TeO2 = 65 mol%), a decrease of non-bridging oxygens is verified, which decreases the polarizability of the system and increasing the Band Gap energy.
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