Utilization of infrared, Raman spectroscopy for structural analysis of alkali boro-germanate glasses

Melt quenching technique was used to prepare (30-x)Li2O-xNa(2)O-40B(2)O(3)-30GeO(2) glasses (x = 0, 5, 10, 20 & 30 mol %). The room temperature infrared spectra of the powdered glass samples were recorded in the range of 400-2000cm(-1). Raman measurements were performed in the range of 200-2000cm(-1) at room temperature. Raman and Infrared spectroscopy was utilized for structural study of this glass system. Specific modes of vibration and peak position were identified from de-convolution of infrared and Raman spectra using Gaussian fitting. Ge-O-Ge bonds' symmetrical stretching vibrations related to 3 members GeO4 rings were allotted to the IR band of 483 cm(-1). The strongest Raman band was allotted to symmetrical stretching vibrations of Ge-O in GeO4 having one non-bridging oxygen with 3 bridging oxygens at 797 cm(-1). The observed Raman and IR spectra of various specimens are utilized here to explain the structural characteristics of current glass.