Effect of ZnO on the physical and optical properties of tellurite base glasses

Abstract

Glass samples in the system 60 TeO2-10B2O 3-(30-x)Bi2O3-xZnO with mole fraction x = 10, 15, 20, 25 and 30 were synthesized by conventional melt quenching technique under controlled atmospheric conditions. The glassy nature of the synthesized glass samples have been confirmed by X-ray diffractogram. It is observed that density (d) and molar volume (Vm) decreases with ZnO concentration and the same trend is also followed by theoretical calculations of crystalline density (dc) and crystalline volume (Vc). The theoretical optical basicity and electronic polarizability both decreases with increase ZnO content. The fundamental absorption edge or cut off wavelength shifts to the lower wavelength side and increase of Eop to higher energies with increase in zinc content is related to the increase in the concentration of the bridging oxygen (BO) atoms. © 2013 American Institute of Physics.