Formation, structure and properties of fluoro-sulfo-phosphate poly-anionic glasses
Le QH, Palenta T, Benzine O, Griebenow K, Limbach R, Kamitsos EI, Wondraczek L (2017)
Publication Type: Journal article
Publication year: 2017
Journal
Book Volume: 477
Pages Range: 58-72
DOI: 10.1016/j.jnoncrysol.2017.09.043
Abstract
Phosphate glasses exhibit high solubility for secondary anion species. This includes sulfate, fluoride or nitride ions, and enables the preparation of poly-anionic glasses. Here, we consider fluoro-sulfo-phosphates. We show that in this system, even equimolar anion mixing can be achieved without notably compromising the glass forming ability. The derived glasses exhibit surprising stability, what enables the fabrication of bulk samples mostly without the need to employ rapid quenching techniques. In terms of molecular structure, they rely on primarily ionic bonding among the different constituents, whereby the fluoride and sulfate anions seem to act as stabilizing ionic cross-linkers between highly-depolymerized phosphate entities. Investigation of the low-frequency Raman scattering indicates characteristic variations on intermediate-range structure, where a shift in the Boson peak appears to correlate inversely with increasing sulfate content. We discuss this observation in terms of the low level of bond localization and low field strength of the sulfate anion relative to phosphate Q0 groups. Adjusting the degree of anion competition enables to tailor super-structural heterogeneity. Beyond this, the glass system provides an interesting variety of ligand situations for the potential incorporation of optically active cation species.
Authors with CRIS profile
Involved external institutions
Friedrich-Schiller-Universität Jena
Germany (DE)
National Hellenic Research Foundation (NHRF) / Εθνικό Ίδρυμα Ερευνών
Greece (GR)
Germany (DE)
National Hellenic Research Foundation (NHRF) / Εθνικό Ίδρυμα Ερευνών
Greece (GR)
How to cite
APA:
Le, Q.H., Palenta, T., Benzine, O., Griebenow, K., Limbach, R., Kamitsos, E.I., & Wondraczek, L. (2017). Formation, structure and properties of fluoro-sulfo-phosphate poly-anionic glasses. Journal of Non-Crystalline Solids, 477, 58-72. https://doi.org/10.1016/j.jnoncrysol.2017.09.043
MLA:
Le, Quyen Huyen, et al. "Formation, structure and properties of fluoro-sulfo-phosphate poly-anionic glasses." Journal of Non-Crystalline Solids 477 (2017): 58-72.
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