Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Mixed-modifier effect in alkaline earth metaphosphate glasses
Δημιουργός/Συγγραφέας:	Griebenow K. Bragatto C.B. [EL] Καμίτσος, Ευστράτιος Ι.[EN] Kamitsos, Efstratios I. Wondraczek L.
Εκδότης:	Elsevier B.V.
Ημερομηνία:	2018
Γλώσσα:	Αγγλικά
ISSN:	0022-3093
DOI:	10.1016/j.jnoncrysol.2017.11.041
Περίληψη:	Modifier-mixing provides a useful tool for tailoring the structural dynamics of oxide glasses. Its physical basis, however, remains subject to intense discussion. Here, we extend our previous consideration of Ca-Mg mixing in alkaline earth metaphosphate glasses [J. Non-Cryst. Solids 468, 74–81 (2017)] across the broader range of alkaline earth species. We report on the effects of divalent modifier mixing for pairs selected from the group of Mg, Ca, Sr and Ba. For this, short-range structural features as obtained from nuclear magnetic resonance, Raman and far-infrared spectroscopy are related to various physical properties, including ionic mobility. Depending primarily on the difference in ion size and bond localization among the modifier cation species, we find different extents of the mixed-modifier effect. This agrees with the dynamic structure model in which the mismatch of cation sites governs non-linear mixing effects.
Τίτλος πηγής δημοσίευσης:	Journal of Non-Crystalline Solids
Τόμος/Κεφάλαιο:	481
Σελίδες:	447-456
Θεματική Κατηγορία:	[EL] Φυσική και θεωρητική χημεία[EN] Physical and theoretical chemistry [EL] Φασματοσκοπία[EN] Spectroscopy
Αξιολόγηση από ομότιμους (peer reviewed):	Ναι
Κάτοχος πνευματικών δικαιωμάτων:	© 2017 The Authors
Όροι και προϋποθέσεις δικαιωμάτων:	All Open Access, Hybrid Gold
Σημειώσεις:	57161434, WO1220/9 Financial support of this work was obtained from the German Science Foundation through its priority program SPP 1594 “Topological Engineering of Ultrastrong Glasses” (grant. no. WO1220/9 ), and from the joint DAAD-IKYDA 2015 program for fostering exchange between German and Greek universities (grant no. 57161434 ). We thank our colleagues René Limbach (mechanical testing), Sindy Fuhrmann and Theresia Palenta (NMR), Christian Zeidler (optical properties) for valuable support in data acquisition and Gabi Möller for the sample preparation. We thank Doris Ehrt and Doris Möncke for fruitful discussions especially in regard to water in phosphate glasses, and Dimitrios Palles, NHRF, for providing expertise in IR and Raman spectroscopy.
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο