2012/01/26 by Cristiane Nascimento Santos, Domingos De Sousa Meneses, Santos, Cristiane N. +5 · 1 citation
Earth and Planetary Sciences · Materials Science · #FOS: Physical sciences #Glass properties and applications #Material Dynamics and Properties #Materials Science (cond-mat.mtrl-sci) #Mineralogy and Gemology Studies #Optics (physics.optics)
paper · pdf · doi:10.48550/arxiv.1201.5676
openalex publication_date 2012/01/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The short-range structure of an iron doped soda-lime glass was investigated by infrared emissivity spectroscopy from room temperature up to the melt. Quantitative information on the distribution of the Qn tetrahedral units was obtained by fitting the emissivity spectra using a dielectric function model (DFM). The DFM is based on causal Gaussian bands, associated with the stretching motions of the silicate tetrahedra. The changes in the absorption modes are related to the activation of a dynamical disorder that continuously increases with temperature. The obtained Qn speciation at room temperature is in good agreement with the magic-angle spinning nuclear magnetic resonance (MAS NMR) study. The distribution of the tetrahedral species undergoes slight changes with temperature, except during glass crystallization where Q4 units increases, with a slight augmentation of Q2 and Q4 units in the melt. These results demonstrate the potentiality of infrared spectroscopy in the quantitative analysis of the polymerization degree of glasses and melts.