Phosphate/Silicate Ratio Allows for Fine-Tuning of Bioactive Glass Crystallisation and Glass-Ceramic Microstructure

Abstract: A combination of XRD, solid-state NMR and state-of-the-art imaging techniques were used to investigate how the calcium orthophosphate/calcium silicate ratio affects the crystallisation of bioactive glasses in the system SiO2-P2O5-CaO-CaF2. In the phosphate-free glass, xonotlite, wollastonite and cuspidine crystallised. From 2.4 mol% P2O5, fluorapatite also formed, while the amount of wollastonite decreased. Crystallisation tendency was low for low phosphate contents, while above 3 mol% P2O5 it increased. The phosphate-free glass showed a volume crystallisation mechanism with constant activation energy. By contrast, the glass with the largest phosphate to silicate ratio showed both volume and surface crystallisation, causing a pronounced decrease in activation energy with crystallisation degree. This work shows that by changing the phosphate/silicate ratio we can determine which crystal phases form, obtaining for example fluorapatite-free or wollastonite-free glass-ceramics, dependi.... https://www.tib-op.org/ojs/index.php/glass-europe/article/view/1187

Angaben zum Objekt

• Standort: Deutsche Nationalbibliothek Frankfurt am Main
• Umfang: Online-Ressource
• Sprache: Englisch

Verweise und Beziehungen

• Erschienen in: Phosphate/Silicate Ratio Allows for Fine-Tuning of Bioactive Glass Crystallisation and Glass-Ceramic Microstructure ; volume:2 ; year:2024 ; Glass Europe ; 2 (2024)

Beteiligte, Orts- und Zeitangaben

• Urheber: Contreras Jaimes, Altair T. ; Kirste, Gloria ; Patzig, Christian ; Martins de Souza e Silva, Juliana ; Massera, Jonathan ; Karpukhina, Natalia ; Hill, Robert G. ; Pablos Martín, Araceli de ; Brauer, Delia S.

Weitere Informationen

• DOI: 10.52825/glass-europe.v2i.1187
• URN: urn:nbn:de:101:1-2406241135542.890074614333
• Rechteinformation: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Letzte Aktualisierung: 14.08.2025, 10:58 MESZ