Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Tailoring the mechanical properties of metaluminous aluminosilicate glasses by phosphate incorporation
Δημιουργός/Συγγραφέας:	Grammes, Thilo Limbach, René Bruns, Sebastian van Wüllen, Leo de Ligny, Dominique [EL] Καμίτσος, Ευστράτιος Ι.[EN] Kamitsos, Efstratios I. Durst, Karsten Wondraczek, Lothar Brauer, Delia S.
Εκδότης:	Frontiers Media
Ημερομηνία:	2020
Γλώσσα:	Αγγλικά
ISSN:	2296-8016
DOI:	10.3389/fmats.2020.00115
Περίληψη:	The characterization of aluminosilicate glasses is highly relevant in geosciences and for engineering applications such as reinforcement fibers or touchscreen covers. The incorporation of phosphate as a third network-forming species into these glasses offers unique opportunities for fine-tuning glass properties via changes in glass structure and polymerization. In this work, we studied melt-quenched aluminosilicate glasses within the system SiO2-Al2O3-Na2O-P2O5 with 50–70 mol% SiO2 and up to 7.5 mol% P2O5. All glasses were metaluminous (Al:Na = 1) in order to maximize the degree of polymerization. Increasing the phosphate content at the expense of NaAlO2 led to reduced glass polymerization and density, resulting in a decrease in elastic moduli and hardness and an increase in strain-rate sensitivity. When increasing the silica content by substituting SiO4 for AlO4 tetrahedra, network polymerization remained mostly unchanged, as confirmed by nearly constant hardness. Densification upon indentation was analyzed by Raman spectroscopy and finite element analysis. We find that the elastic properties and hardness of metaluminous phospho-aluminosilicate glasses are governed by changes in density and network polymerization. Other mechanical properties underlie more complex changes in glass structure.
Τίτλος πηγής δημοσίευσης:	Frontiers in Materials
Τόμος/Κεφάλαιο:	7
Σελίδες:	115
Θεματική Κατηγορία:	[EL] Φυσική και θεωρητική χημεία[EN] Physical and theoretical chemistry [EL] Γεωλογία[EN] Geology [EL] Χημεία (Γενικά)[EN] Chemistry (General) [EL] Φασματοσκοπία[EN] Spectroscopy
Λέξεις-Κλειδιά:	Glass Mechanical properties Density Aluminosilicate Phosphate Elastic properties Hardness Densification
Κάτοχος πνευματικών δικαιωμάτων:	Copyright © 2020 by the authors
Ηλεκτρονική διεύθυνση στον εκδότη (link):	https://www.frontiersin.org/articles/10.3389/fmats.2020.00115/full
Ηλεκτρονική διεύθυνση περιοδικού (link) :	https://www.frontiersin.org/journals/materials
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο