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The effect of composition on the structure of sodium borophosphate glasses

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Carta, Daniela, Qiu, D. (Dong), Guerry, Paul, Ahmed, Ifty, Abou Neel, Ensanya A., Knowles, Jonathan C., Smith, Mark E. and Newport, Robert J.. (2008) The effect of composition on the structure of sodium borophosphate glasses. Journal of Non-Crystalline Solids, Vol.354 (No.31). pp. 3671-3677. ISSN 0022-3093

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Abstract

Glasses in the system 40(P2O5)-x(B2O3)-(60-x)(Na2O) (10 <= x <= 30 mol%) have been prepared by the melt-quenching technique. Thermal properties were studied using differential thermal analysis and the relationship between composition and thermal stability was obtained. Structural characterization was achieved by a combination of experimental data (infrared and Raman spectroscopy, B-11 and P-31 solid state NMR). In particular, variations in the phosphate network structure upon addition of B2O3 and Na2O were investigated. Analysis of the data indicates that with increasing B2O3 content and decreasing Na2O, the glass network shows increasing levels of cross-linking between phosphate and borate units. Evidence of direct B-O-P bonds was observed. In the compositional range investigated, borate groups contain boron almost exclusively in four-fold coordination. (C) 2008 Elsevier B.V. All rights reserved.

Item Type: Journal Article
Subjects: T Technology > TP Chemical technology
T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Administration > Vice Chancellor's Office
Faculty of Science > Physics
Library of Congress Subject Headings (LCSH): Phosphates, Glass, Sodium
Journal or Publication Title: Journal of Non-Crystalline Solids
Publisher: Elsevier Science BV
ISSN: 0022-3093
Official Date: 1 August 2008
Volume: Vol.354
Number: No.31
Number of Pages: 7
Page Range: pp. 3671-3677
Identification Number: 10.1016/j.jnoncrysol.2008.04.009
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Funder: Engineering and Physical Sciences Research Council (EPSRC)
Grant number: EP/C000714/1 (EPSRC), GR/T21080/1 (EPSRC), EP/C000633/1 (EPSRC)
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URI: http://wrap.warwick.ac.uk/id/eprint/29624

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