Study of ZnO modified Lithium Borate Bismuth glasses

Abstract

Quaternary glasses with composition (40-x) Li2O:30B2O3:30Bi2O3: x ZnO have been prepared with x varying from 0 to 6 mol%. The structural investigation of these glasses has been carried out by infrared (IR) absorption spectra. Addition of ZnO in the glass is favorable for the creation of BiO6 units on account of the substitution of B-O bond by Bi-O bond. Changes in density and molar volume in glasses have been studied. Molar volume reduces which is ascribed to the decrease in boron-boron spacing, d<B-B>. Increment in cut off wave length and decrement in. optical band gap energy is observed in Optical absorption spectra with increase in ZnO on account of rise in Non-Bridging Oxygens Electronic polarizability and optical basicity was also studied.