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, May 2013, Pages 6–11
UV spectroscopy, refractive indices and elastic properties of the (76&&&x) TeO2&9P2O5&15ZnO&xLiNbO3 glass, , , , a Physics Deptartment, Faculty of Science, King Khalid University, P. O. Box 9004, Abha, Saudi Arabiab Physics Deptartment, Faculty of Science, Al- Azhar University, Assiut branch, Assiut, Egyptc Physics Deptartment, Faculty of Girls, King Khalid University, P. O. Box 9004, Abha, Saudi ArabiaTellurite 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.Graphical abstractHighlights? Effects of LiNbO3 lead to a decrease in optical energy gap (Eopt). ? The refractive index (n0) increases with increasing LiNbO3 content. ? Elastic moduli increase with LiNbO3 content indicating that increase in connectivity of the investigated glasses.KeywordsGlasses; Optical; Elastic properties
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