Effect of B₂O₃ addition on thermal and optical properties of TeO₂–ZnO–Bi₂O₃–TiO₂ glasses

Abstract

New tellurite glasses with composition (in mol%): 60TeO2–(30-x)ZnO–5Bi2O3–5TiO2-xB2O3 (where x = 0, 2.5, 5.0, 7.5 and 10.0) were fabricated using conventional melt quenching method. Compositional dependence of the glasses on their density, thermal, refractive index and optical properties were investigated. X-Ray Diffraction analysis was carried out to confirm the nature of the thus formed glasses. Density, refractive index, and absorption spectra were measured at room temperature from which other glass characteristics such as polaron radius, oxygen packing density, field strength, B3+ interatomic distance, band gap energy, and Urbach tail were determined. Thermal characterisation to determine the change in glass transition temperature, glass crystallisation, melting point, and glass stability was carried out using Differential Scanning Calorimetry. A discussion was made in order to understand the results in terms of the ratio of bridging oxygen to non-bridging oxygen ions (BO/NBO). It was found that the addition of B2O3 results in increasing oxygen packing density, glass transition temperature, BO/NBO ratio and band gap energy, while decreasing density, refractive index, field strength, glass stability and Urbach tail energy. With increasing B2O3 concentration density changed from 5.879 to 5.646 g/cm3, refractive index 1.875 to 1.741, working temperature range (ΔT = 660C) and phonon energy within the range of 736 – 740 cm-1.

Influence of B2O3/ZnO Exchange in Gamma Shielding Properties of TBTZ Glasses

“…Borate and tellurite glasses have a series of superior properties compared to other types of glass. TeO2 glass has wide optical transmission, high rare earth ions solubility, low melting temperature, wide window of transparency (400 nm to 6 μm), high refractive index, and high density [25] [26].…”

Investigation on the effect of ZnO/PbO exchange on Physical and Optical Properties of Tellurite Sodium Bismuth Zinc doped Lead Oxide Glasses

“…Tellurite glass is primarily composed of TeO2 [6], which possesses a unique set of properties. Although the addition of other components is necessary for glass formation [7], tellurite glass exhibits a low melting point, excellent thermal stability, high density, a high refractive index, low energy phonons, and remarkable chemical and physical resistance [8][9][10][11][12].…”

Effect of sodium oxide (Na2O) glass modifier on physical properties and gamma shielding in tellurite glass systems TeO2-ZnO-PbO-Bi2O3 (TZPB)

“…The characteristic of tellurite glass is good thermal and chemical stability, low phonon energy, high density, low melting temperature, and effective photon shielding characteristics. It can potentially be a shielding material for gamma radiation (Fausta et al, 2020;Almuqrin & Sayyed, 2021;Marzuki et al, 2022).…”