Fe-dependent structural evolution of peralkaline soda aluminosilicate glasses: Iron speciation vs. glass transition
Year: 2024
Type: article
Abstract: The incorporation of iron into peralkaline silicate glasses significantly impacts their structural and thermal properties. Here we investigate how addition of iron influences the network connectivity (short- and medium-range order) and glass transition temperature ( T g ) with particular regard to the iron speciation and the Fe 2+ and Fe 3+ coordination state. We also found a sort of tipping point in iron concentration beyond which the short-range structures evolve linearly with density while the medium-range structure deviates from linearity. This behavior seems related to a re-enrichment of tetrahedral units triggered by iron self-compensation effect explaining the observed jump in T g .
Source: Chemical Geology
Institutions: University of Verona, Torino e-district, University of Turin, University of Foggia, Istituto Nazionale di Geofisica e Vulcanologia, University of Trento, Leibniz University Hannover, Institute of Condensed Matter Chemistry and Technologies for Energy, National Research Council, Institute of Geosciences and Earth Resources, Institute of Science, Technology and Sustainability for Ceramics
Language: English
Subfield: Ceramics and Composites
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,420
Awards: G1016895160, G2453131348
OpenAlex ID: W4405221776