Fe-dependent structural evolution of peralkaline soda aluminosilicate glasses: Iron speciation vs. glass transition
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. This behavior seems related to a re-enrichment of tetrahedral units triggered by iron self-compensation effect explaining the observed jump in T g .
Authors
- Vincenzo M. Sglavo (ORCID: https://orcid.org/0000-0001-9133-7204)
- Renat Almeev (ORCID: https://orcid.org/0000-0003-0652-9469)
- Beatrice Giannetta (ORCID: https://orcid.org/0000-0001-6451-6784)
- N. Daldosso (ORCID: https://orcid.org/0000-0002-5578-4223)
- Michele Cassetta (ORCID: https://orcid.org/0000-0003-2078-655X)
- Francesco Enrichi (ORCID: https://orcid.org/0000-0002-3443-3707)
- Luca Nodari (ORCID: https://orcid.org/0000-0001-9296-463X)
- Claudio Zaccone (ORCID: https://orcid.org/0000-0003-4391-354X)
- G. Mariotto (ORCID: https://orcid.org/0000-0002-3230-0839)
- Mattia Biesuz (ORCID: https://orcid.org/0000-0002-4338-4177)
- Emanuele De Bona (ORCID: https://orcid.org/0000-0001-5133-5108)
- Daniele Giordano (ORCID: https://orcid.org/0000-0003-1271-5516)
- Alessia Sambugaro (ORCID: https://orcid.org/0000-0001-7581-9553)
Institutions
- University of Foggia (IT)
- Leibniz University Hannover (DE)
- University of Verona (IT)
- University of Trento (IT)
- Istituto Nazionale di Geofisica e Vulcanologia (IT)
- Institute of Geosciences and Earth Resources (IT)
- Institute of Science and Technology for Ceramics (IT)
- Institute of Condensed Matter Chemistry and Technologies for Energy (IT)
- Torino e-district (IT)
- National Research Council (IT)
- University of Turin (IT)
Publication Details
- Journal
- Chemical Geology
- Published
- 2024-12-11
- DOI
- https://doi.org/10.1016/j.chemgeo.2024.122561
- Citations
- 7
- Primary Topic
- Glass properties and applications
- Type
- article
- Field-Weighted Citation Impact
- 1.64
Funders
- European Commission
- Deutsche Forschungsgemeinschaft