Optical,physical and structural studies of boro-zinc tellurite glasses |
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| Authors: | P Gayathri Pavani K Sadhana V Chandra Mouli |
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| Institution: | 1. Physics Department, Faculty of Science, Al Azhar University, Nasr City, Cairo 11884, Egypt;2. Engineering, Mathematics, and Physics Department, Faculty of Engineering, Benha University, Egypt;3. Department of Physics, Faculty of Science, Jazan University, Saudi Arabia;1. Lobachevsky State University of Nizhny Novgorod, 23 Gagarin Avenue, Nizhny Novgorod 603950, Russia;2. G.G. Devyatykh Institute of Chemistry of High Purity Substances RAS, 49 Tropinin Str., Nizhny Novgorod 603951, Russia |
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| Abstract: | To investigate the modification effect of the modifier ZnO on boro-tellurite glass, a series of glasses with compositions 50B2O3–(50?x)ZnO–xTeO2 have been prepared by conventional melt quenching technique. Amorphous nature of the samples was confirmed through X-ray diffraction technique. Optical absorption and IR structural studies are carried out on the glass system. The optical absorption studies revealed that the cutoff wavelength increases while optical band gap (Eopt) and Urbach energy decreases with an increase of ZnO content. Refractive index evaluated from Eopt was found to increase with an increase of ZnO content. The compositional dependence of different physical parameters such as density, molar volume, oxygen packing density, optical basicity, have been analyzed and discussed. The IR studies showed that the structure of glass consists of TeO4, TeO3/TeO3+1, BO3, BO4 and ZnO4 units. |
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