WO.sub.3./sub.-doped zinc borophosphate glasses

0331754 - FZÚ 2010 RIV GB eng J - Journal Article
Šubčík, J. - Koudelka, L. - Mošner, P. - Gregora, Ivan - Montagne, L. - Revel, B.
WO₃-doped zinc borophosphate glasses.
[Zinko-borofosfátová skla legovaná WO₃.]
European Journal of Glass Science and Techology. Part B. Physics and Chemistry of Glasses. Roč. 50, č. 4 (2009), 243-248. ISSN 1753-3562
R&D Projects: GA AV ČR KAN301370701
Institutional research plan: CEZ:AV0Z10100520
Keywords : tungstate zinc borophosphate glasses * Raman spectroscopy * temperature * NMR
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 0.553, year: 2009

The effect of WO3 on the properties and structure of zinc borophosphate glasses was investigated. Homogeneous glasses of the composition (100−x)[0·5ZnO.0·1B2O3.0·4P2O5].xWO3 were obtained within the concentration range of x=0–40 mol% WO3, whereas glasses with x=45 and 50 contain microinclusions of β-WO3. The structure of the glasses was studied by Raman and infrared spectroscopy, combined with 31P and 11B MAS NMR spectroscopy. Raman spectra identify vibrations of WO6 and W–O–W bonds, respectively. Compositional changes in the 11B MAS NMR spectra reveal a partial conversion of BO4 to BO3 units with increasing WO3 content, and the replacement of B–O–P bridges by B–O–W bridges.

Byl studován vliv WO3 na vlastnosti a strukturu zinko-borofosfátových skel. Homogenní skla o složení(100−x)[0·5ZnO.0·1B2O3.0·4P2O5].xWO3 byla připravena v oboru koncentrací x=0–40 mol% WO3, kdežto skla s x=45 a 50 obsahují mikroinkluze β-WO3. struktura skel byla zkoumána Ramanovou a infračervenou spektrosckopií, v kombinaci s 31P a 11B MAS NMR. Ramanova spektra identifikují vibrace WO6 a W-O-W vazeb. 11B MAS NMR spektra odhalují částečnou konverzi BO4 na BO3 jednotek s rostoucím obsahem WO3 content, a nahrazení B–O–P můstků B–O–W můstky.
Permanent Link: http://hdl.handle.net/11104/0177187