Abstract
Novel oxyfluorotellurite glasses within the composition (80-x) TeO2-10P(2)O(5)-10ZnO-xNaF in mol%, where x = 0, 5, 7.5, 10, 12.5, 15, 20 and 25 were prepared. The thermal kinetics and optical properties of these glasses were estimated by using differential scanning calorimetric (DSC), and UV-Vis-NIR spectroscopy respectively. The results of the thermal analysis were indicated that oxyfluorotellurite telluride glass has high thermal stability. The density, oxygen packing density, molar volumes, molar refraction, metallization criterion, molar polarizability, linear refractive index and optical basicity were calculated. It was found that with the increase NaF from TPZN0 0.0 to 15%, the linear refractive index (n) was increased otherwise the optical energy gap (E-opt) was decreased. The structure of the present glasses investigated by using infrared and Raman spectroscopy. Herein in this work, the results suggest that the present oxytellurirde glasses modified by NaF can be used as a promising material in optical applications.