Hannon, Alex C., Barney, Emma R. and Holland, D. (2009) The structure of tin borate based glasses. In: 10th ESG Conference/84th Annual Meeting of theDeutsche-Glastechnisch-Gesellschaft, Frankfurt, Germany, September 30, 2009. Published in: European Journal of Glass Science and Techology. Part B. Physics and Chemistry of Glasses, Vol.50 (No.5). pp. 271-283.

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Abstract

A series of tin borate glass samples was prepared by melting in alumina crucibles, and these were studied by means of. neutron diffraction, Al-27 and B-11 MAS (magic angle spinning) NMR, density, XRF and EDX measurements, The results show that the samples contain about 6.5 mol% Al2O3 from the crucibles, and when this was taken into account the B-O coordination numbers from neutron diffraction showed reasonable agreement with B-11 MAS NMR results. These results serve as a case study for showing the importance of sample composition for a correct analysis of diffraction results for glasses. Die presence of Al2O3 has only a small effect on the number of 4-coordinated borons because few of the aluminium are on 4-coordinated sites. For low SnO content, both the fraction of 4-coordinated borons and the mean B-O bond length increase as SnO is added. However, for greater than 50 mol% SnO the fraction of 4-coordinated borons decreases, but the mean B-O bond length remains constant, and this behaviour of the bond length is as yet unexplained. For the Sn-O coordination, the results may be interpreted as showing that for high SnO content the Sn2+ ions are predominantly on asymmetric, trigonal pyramid SnO3 sites, but that, for low SnO content the Sn2+ ions are on a mixture of asymmetric SnO3 sites and synnnetric, high coordination sites.

Item Type:	Conference Item (Paper)
Subjects:	Q Science > QD Chemistry T Technology > TP Chemical technology
Divisions:	Faculty of Science > Physics
Journal or Publication Title:	European Journal of Glass Science and Techology. Part B. Physics and Chemistry of Glasses
Publisher:	Society of Glass Technology
ISSN:	1753-3562
Date:	October 2009
Volume:	Vol.50
Number:	No.5
Number of Pages:	13
Page Range:	pp. 271-283
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Conference Paper Type:	Paper
Title of Event:	10th ESG Conference/84th Annual Meeting of theDeutsche-Glastechnisch-Gesellschaft
Type of Event:	Conference
Location of Event:	Frankfurt, Germany
Date(s) of Event:	September 30, 2009
URI:	http://wrap.warwick.ac.uk/id/eprint/16923

Data sourced from Thomson Reuters' Web of Knowledge

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