Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Structural aspects of lead borate glasses prepared in platinum and alumina crucibles
Δημιουργός/Συγγραφέας:	Tsekrekas, Elizabeth M. Tagiara, Nagia S. Youngman, Randall E. [EL] Καμίτσος, Ευστράτιος Ι.[EN] Kamitsos, Efstratios I. Clare, Alexis G.
Ημερομηνία:	2025
Γλώσσα:	Αγγλικά
ISSN:	00223093
DOI:	10.1016/j.jnoncrysol.2025.123521
Περίληψη:	Lead borate glasses in the system xPbO-(100-x)B2O3 have been prepared in platinum and alumina crucibles. Glasses were investigated qualitatively by Raman and infrared spectroscopies, and quantitatively by NMR spectroscopy, to determine the effect of Al2O3 contamination on the glass network. Glasses melted in a platinum crucible had a formation range of 30 ≤ x ≤ 80 mol% PbO, while glasses prepared in alumina crucibles experienced an expansion in the formation range, i.e. 20 ≤ x ≤ 85 mol%, as a result of Al2O3 contamination from the alumina crucible. Both the mid-frequency Raman and infrared data, as well as NMR spectroscopy, suggest that the introduction of Al2O3 within the glass results in the under-modification of the borate network due to the formation of anionic AlOn type units charge balanced by Pb2+ ions. This is also reflected in the low-frequency region of the Raman and infrared spectra, which relates to the Pb-O vibrations, where the Pb-O bonding remains predominately ionic for a larger composition range in the Al2O3 contaminated glasses (x ≤ 60), while the Pb-O bond also acquires covalent character for x ≥ 70 mol%.
Τίτλος πηγής δημοσίευσης:	Journal of Non-Crystalline Solids
Τόμος/Κεφάλαιο:	659
Θεματική Κατηγορία:	[EL] Φυσική και θεωρητική χημεία[EN] Physical and theoretical chemistry [EL] Φασματοσκοπία[EN] Spectroscopy
Λέξεις-Κλειδιά:	borate glasses lead oxide crucible dissolution raman spectroscopy IR spectroscopy NMR
Χρηματοδότης:	European Union, European Regional Development Fund Greece New York State Department of Environmental Conservation Corning Incorporated
Χρηματοδοτικό πρόγραμμα:	National Infrastructure in Nanotechnology, Advanced Materials and Micro-/Nanoelectronics Glass Recycling Project at Alfred University Corning Incorporated Glass Age Scholarship Travel Grant
Αναγνωριστικό χρηματοδοτικού προγράμματος:	MIS 5002772
Κάτοχος πνευματικών δικαιωμάτων:	© 2025 Elsevier B.V. All rights are reserved, including those for text and data mining, AI training, and similar technologies.
Ηλεκτρονική διεύθυνση στον εκδότη (link):	https://doi.org/10.1016/j.jnoncrysol.2025.123521
Σημειώσεις:	This work was supported by the New York State Department of Environmental Conservation under the Glass Recycling Project at Alfred University. Additionally, E. M. Tsekrekas would like to thank Corning Incorporated who provided travel support through a Corning Incorporated Glass Age Scholarship Travel Grant to the National Hellenic Research Foundation in Athens, Greece, where Raman and infrared spectroscopy was conducted. E. I. Kamitsos and N. S. Tagiara acknowledge the support by the project “National Infrastructure in Nanotechnology, Advanced Materials and Micro-/Nanoelectronics” (MIS 5002772), co-financed by Greece and the European Union (European Regional Development Fund). The authors would also like to thank Abigail Austin and Arlene Clark (Characterization Sciences, Corning Incorporated) for their analysis of the glass compositions.
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο