Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	The effect of nitrogen on the structure and thermal properties of beryllium-containing Na-(Li)-Si-O-N glasses
Δημιουργός/Συγγραφέας:	Wójcik N.A. Jonson B. Möncke D. [EL] Καμίτσος, Ευστράτιος Ι.[EN] Kamitsos, Efstratios I. Segawa H. Karczewski J. Ali S.
Εκδότης:	Elsevier B.V.
Ημερομηνία:	2019
Γλώσσα:	Αγγλικά
ISSN:	0022-3093
DOI:	10.1016/j.jnoncrysol.2019.119585
Περίληψη:	Two oxynitride glass series with the composition of 35Na2O-5BeO-(60-x)SiO2-xSi3N4 and 9Li2O- 27Na2O-5BeO-(59-x)SiO2-xSi3N4, were prepared. The glasses' topography and structure were studied by Scanning Electron Microscopy and Raman spectroscopy. The composition was analyzed by Inductively Coupled Plasma Optical Emission Spectrometer, SEM-EDS and nitrogen and oxygen elemental analyzer. Na-(Li)-Be-silicate glasses were found to contain up to approximately 3.4 (or 5.2 for EDS measurements) at.% of N, respectively. The samples were homogenous in their topography and compositions of their cross-sections. The presence of three-fold coordinated nitrogen atoms in Na-Be-Si-O-N glasses results in higher degree of polymerization as was observed by Raman spectroscopy. The spectrum of analogous glasses with lithium did not show a significant decrease in Q2 units but exhibit the presence of Q4 units which also indicates a polymerization of the network. The incorporation of nitrogen in these glasses leads to the increase of the glass transition temperature and thermal stability.
Τίτλος πηγής δημοσίευσης:	Journal of Non-Crystalline Solids
Τόμος/Κεφάλαιο:	522
Θεματική Κατηγορία:	[EL] Φυσική και θεωρητική χημεία[EN] Physical and theoretical chemistry
Λέξεις-Κλειδιά:	Beryllium-silicate glasses Oxynitride glasses Raman spectroscopy Thermal properties
Αξιολόγηση από ομότιμους (peer reviewed):	Ναι
Κάτοχος πνευματικών δικαιωμάτων:	© 2019 Elsevier B.V.
Σημειώσεις:	Knowledge Foundation: NSRF 2014-2020; European Commission, EC; VINNOVA; Stiftelsen för Kunskaps- och Kompetensutveckling, KKS: 68110029; Crafoordska Stiftelsen: 2015-04809, 20160900; European Regional Development Fund, FEDER Financial support from the Crafoord Foundation (Grant No: 20160900 ). Support from the Vinnova (Grant No. 2015-04809 ). Knowledge Foundation , Sweden (Grant No. 68110029 ) for financing her stay at Linnæus University. EIK acknowledges the project “ National Infrastructure in Nanotechnology, Advanced Materials and Micro-/Nanoelectronics ” (MIS 5002772 ) which is implemented under the Action “Reinforcement of the Research and Innovation Infrastructure”, funded by the Operational Programme “Competitiveness, Entrepreneurship and Innovation” (NSRF 2014-2020) and co-financed by Greece and the European Union (European Regional Development Fund).
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο