Abstract
Tellurite glass with composition (76 − x) TeO2·9P2O5·15ZnO·xLiNbO3 (where x = 12.5, 25, 30 and 35 in mol%) have been prepared by melt-quenching method. The optical properties of the glass were estimated by measuring UV–VIS spectroscopy and refractive indices at different wavelength. From the absorption edge studies, the optical energy gap (Eopt) and Urbach energy (ΔE) has been evaluated. Moreover mechanical properties with structural properties of the glasses were investigated by measuring both longitudinal and shear velocities by using the pulse-echo overlap technique at 5 MHz. The elastic moduli such as: longitudinal (λ), shear (μ), bulk (B) and Young’s (Y) increase with the increase in LiNbO3 content in the prepared glasses matrix. The different physical parameters such as density, molar volume, oxygen molar volume, oxygen packing density, molar polarizability, Debye temperature, microhardness, Poisson's ratio, kinetic fragility and fractal bond connectivity have been computed and were found to depend on the glass composition.
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