1. Physical, optical, thermal, and gamma-ray shielding features of fluorotellurite lithiumniobate glasses: TeO2-LiNbO3-BaO-BaF2-La2O3
- Author
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El Sayed Yousef, F. Elmasry, F.I. El-Agawany, N. Elkhoshkhany, Iwona Grelowska, Y.S. Rammah, and Manuela Reben
- Subjects
010302 applied physics ,Quenching ,Materials science ,Mean free path ,Attenuation ,Lithium niobate ,Gamma ray ,Analytical chemistry ,Condensed Matter Physics ,01 natural sciences ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials ,chemistry.chemical_compound ,chemistry ,0103 physical sciences ,Electromagnetic shielding ,Thermal stability ,Electrical and Electronic Engineering ,Glass transition - Abstract
Novel series of fluorotellurite lithium niobate glasses with compositions TeO2–LiNbO3–BaO–BaF2–La2O3 coded as Pr3, Pr4, Pr5, Pr6, and Pr7 were fabricated using the traditional process of quenching the melt. The density of the fabricated glasses was varied from 5.1689 to 5.4088 g/cm3, while optical packing density (o.p.d) was taken values from 50.85 to 64.4 g atom l−1. The thermal features glasses were determined by using (DSC), while their optical properties were determined in ultraviolet–visible–near-IR (UV–Vis–NIR) spectral region. Results revealed that the glass transition temperature (Tg) has the lowest value for Pr6 glass sample otherwise the highest value in Pr3 sample. The thermal stability (ΔT) was equal to 133, 149,154,127, and 153 °C for Pr3, Pr4, Pr5. Pr6, and Pr7 glass samples, respectively. The optical energy gap (Eopt) varied from 2.81 to 3.12 eV, while the Sellmeier gap energy (ES) changed from 6.6 to 8.55 eV. Also, gamma-ray shielding competences of the fabricated glasses were evaluated in terms of their mass and linear attenuation coefficients (MAC, LAC), half-value layer (HVL), and mean free path (MFP). The obtained values showed that LAC was in the order of Pr7 > Pr6 > Pr3 > P4 > Pr5, while HVL arranged in the order of Pr7
- Published
- 2021
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