Optical properties and concentration dependence of BaO-GeO2 in glass systems

초록

We prepared novel barium germanium (BaO-GeO2) glass samples with varying BaO concentrations and inves-tigated their physical and optical properties. We analyzed the refractive indices, glass transition temperatures (T ������s), molar volumes, and optical band gaps of the samples, which were measured and plotted against their BaO concentrations. The results showed that refractive indices, T ������s, molar volumes, and coefficients of thermal expansion increased with BaO concentration. Raman spectra showed structural network modifications and typical Germanium glass bands. The band at similar to 529 cm-1 was assigned to vibration bonds of Ge(4)-O-Ge(4), and that at similar to 823 cm-1 was attributed to stretching vibration of non-bridging oxygen (NBO) atoms.

키워드