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

Abstract New tellurite glasses with composition (in mol%): 60TeO 2 –(30-x)ZnO–5Bi O 3 –5TiO -xB (where x = 0, 2.5, 5.0, 7.5 and 10.0) were fabricated using conventional melt quenching method. Compositional dependence of the on their density, thermal, refractive index optical properties investigated. X-Ray Diffraction analysis was carried out to confirm nature thus formed glasses. Density, index, absorption spectra measured at room temperature from which other glass characteristics such as polaron radius, oxygen packing field strength, B 3+ interatomic distance, band gap energy, Urbach tail determined. Thermal characterisation determine change in transition temperature, crystallisation, melting point, stability Differential Scanning Calorimetry. A discussion made order understand results terms ratio bridging non-bridging ions (BO/NBO). It found that addition increasing BO/NBO while decreasing energy. With concentration density changed 5.879 5.646 g cm −3 , 1.875 1.741, working range (Δ T 66 °C) phonon energy within 736–740 −1 .