Spectroscopic behaviour and internal friction of glasses containing iron having different redox ratios

TLDR: In this article, the internal friction behavior of Na2O-3SiO2 glasses having different redox ratios has been studied and the importance of this structural change on the electronic conductivity behaviour of these types of glasses is mentioned.

Abstract: The Mossbauer and ESR spectra and internal friction behaviour of Na2O-3SiO2 glasses having different redox ratios have been studied. As the redox ratio changes over a considerable range, there is a significant structural change associated with both the Fe3+ and Fe2+ ions, as evidenced from the analysis of the molar volume and Mossbauer data. The ESR data qualitatively supports the Mossbauer data on the Fe3+ ions. The change of internal friction behaviour of these glasses around 50% Fe3+ is described in terms of the structural changes associated with the Fe ions, which is thought to influence the oxygen structure of these glasses. The importance of this structural change on the electronic conductivity behaviour of these types of glasses is mentioned.