The effect of fluorine replacement on the physical properties of oxyfluorotellurite glasses TeO2-Li2O-ZnO-ZnF2

• Published in: Journal of non-crystalline solids Vol. 603; p. 122083
• Main Authors: Gunha, Jaqueline Valeski, Muniz, Robson Ferrari, Somer, Aloisi, Sabino, Simone do R.F., Dias, Daniele Toniolo, El-Mallawany, R., Novatski, Andressa
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.03.2023
• Subjects: Crystallization; Glasses; Oxyfluorotellurite; Photoacoustic spectroscopy radiation shielding; Structure; Tellurite; Glasses; Oxyfluorotellurite; Tellurite; Structure; Photoacoustic spectroscopy radiation shielding; Crystallization
• ISSN: 0022-3093; 1873-4812
• DOI: 10.1016/j.jnoncrysol.2022.122083

•Novel oxyfluorotellurite glasses in the composition 65TeO2–15Li2O-(20-x)ZnO-xZnF2 and x = 0, 5, 10 mol% were prepared by melting quenching technique.•Crystallization kinetics of oxyfluorotellurite glasses.•Measurements of :X-ray diffraction, FTIR, Raman, density, differential scanning calorimeter (DSC), and absorption spectrum data in the UV–Vis.•Determination of shielding parameters. Oxyfluorotellurite glasses in the composition 65TeO2–15Li2O-(20-x)ZnO-xZnF2 (x = 0, 5, 10 mol%) were prepared by melting quenching technique and their physical, thermal and structural properties were investigated. The results showed that the density and the oxygen packing density values decrease with increasing x. By the differential scanning calorimetry, the crystallization kinetic for each sample was evaluated and showed that activation energy decreases with increasing x, which can be related to the exchange of simple Te-O bonds for Te-F bonds. The variation on the quantity of these bonds were confirmed by FTIR and Raman spectroscopy. The mass attenuation coefficient values were found to reduce exponentially with increasing the energy. The radiation protection efficiency of glasses with 10 mm was 100, 50, and 30% for X-ray (40 KeV), 60Co (2.5MeV), and 137Cs energy lines (284 KeV & 66 KeV), respectively. Mass attenuation coefficient of 65TeO2–15Li2O-(20-x)ZnO-xZnF2 (x = 0, 5, 10) glasses and some ordinary materials used in radiation shielding. [Display omitted]