The effect of tin on sulfur K-edge X-ray absorption near edge structure spectra of soda–lime–silicate glass: An experimental and comparative study

Considering the strong sensitivity of X-ray absorption near edge structure (XANES) spectra to the oxidation state and local environment, the sulfur K-edge XANES spectra of series of samples, including a typical float glass product, starting soda–lime–silicate glass samples and the SnO2-bearing glass samples heat-treated at different temperature and durations under the reduced atmosphere of N2/H2 (90/10 volume ratio), were systematically investigated in this paper. The gradual evolution of lower energy shoulder of series of samples in the region from 2468.8 eV to 2473.1 eV makes us assure that this shoulder should be related to the Sn―S local coordination of S2 − species. In addition, this Sn―S local coordination of S2 − species is stable at the temperature lower than 750 °C and it will gradually vanish with the enhancement of temperature. This understanding should be very helpful to the adjustment of parameters of float glass process.