Quaternary tellurite glass systems in the form 75TeO2-15ZnO-(10- x)Nb2O5-xGd2O3, where (x=0.0, 0.5,1.0,1.5,2.0 and 2.5 mol%) have been prepared by the melt quenching technique. Optical absorption studies are carried out on the glass systemin the wavelength range of 380-500 nm. The cut-off wavelength λc, optical band gap Eopt, Urbach energy ΔE and refractive index n values were calculated from optical absorption data. Also, different physical parameters such as, molar refraction RM, metallization criterion M, electronic polarizability of the oxide ion αo2- (calculated from Eopt), and optical basicity Λ have been determined. The FTIR absorption spectra for all glasses in the range of wave numbers 350-4000 cm-1 has been recorded and designated. © 2014 The Authors.
Elkhoshkhany, N., Abbas, R., El-Mallawany, R., & Fraih, A. J. (2014). Optical Properties of quaternary TeO2-ZnO-Nb2O 5-Gd2O3 glasses. Ceramics International, 40(9 PART A), 14477–14481. https://doi.org/10.1016/j.ceramint.2014.07.006