Abstract
Glasses with the composition, (80-x)TeO2-xLi(2)O-20ZnO with x = 0, 5 and 10 (in mol%), were prepared by conventional melt quenching method. Properties such as density, molar volume, glass transition activation energy, crystallization activation energy and thermal stability as a function of Li2O content are reported. FTIR results revealed that the glassy matrix is composed of TeO3, TeO3+1, TeO4 units and ZnO4 structural units. The optical transmission studies revealed that the lambda(cutoff) wavelength and optical band gap energy (E-opt) decreases with the addition and increase of Li2O content while Urbach energy (E-0) and refractive index increases. (C) 2012 Elsevier B.V. All rights reserved.