Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Structure and mechanical properties of copper-lead and copper-zinc borate glasses
Δημιουργός/Συγγραφέας:	Yao Z.Y. Möncke D. [EL] Καμίτσος, Ευστράτιος Ι.[EN] Kamitsos, Efstratios I. Houizot P. Célarié F. Rouxel T. Wondraczek L.
Εκδότης:	Elsevier
Ημερομηνία:	2016
Γλώσσα:	Αγγλικά
ISSN:	0022-3093
DOI:	10.1016/j.jnoncrysol.2015.12.005
Περίληψη:	Copper-lead and copper-zinc borate glasses with different copper contents were prepared and studied for correlations between structure and mechanical properties, where the cations are used to tailor the intermediate-range speciation of borate groups. Structural characterization was done by optical absorption, electron spin resonance (ESR), Raman and infrared (IR) spectroscopy. The mechanical properties were investigated through in-depth instrumented indentation and mechanical resonance analyses. The zinc metaborate glass series shows a high disproportionation of metaborate into mainly trigonal pyroborate [B2O5]4 - and polyborate [BØ3]0 units, while the lead borate glass series exhibits a network based on trigonal [BØ2O]- and tetrahedral [BØ4]- metaborate units and a minor PbO-pseudophase (Ø = bridging oxygen and O = non-bridging oxygen). For both glass types, the addition of copper oxide results in a more homogenous network containing [BØ2O]- and [BØ4]- metaborate units. This induces an enhancement of the elastic moduli and hardness in the lead borate glass series, but a decrease of these properties in the copper-zinc borate glasses, whereby copper-zinc borate glasses are stiffer and harder than copper-lead borate glasses.
Τίτλος πηγής δημοσίευσης:	Journal of Non-Crystalline Solids
Τόμος/Κεφάλαιο:	435
Σελίδες:	55-68
Θεματική Κατηγορία:	[EL] Φυσική και θεωρητική χημεία[EN] Physical and theoretical chemistry [EL] Φασματοσκοπία[EN] Spectroscopy
Λέξεις-Κλειδιά:	Borate Copper Elastic moduli Glass Indentation toughness Structure
Αξιολόγηση από ομότιμους (peer reviewed):	Ναι
Κάτοχος πνευματικών δικαιωμάτων:	© 2015 Elsevier B.V.
Σημειώσεις:	WO 1220/10-1; Région Bretagne: 12006858 Financial support of this work by Region Bretagne (France) through its ARED program No. 12006858, and by the German Science Foundation through the priority program 1594 (grant no. WO 1220/10-1 ) is acknowledged. O246s.
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο