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The structure of tin borate based glasses
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Hannon, Alex C., Barney, Emma R. and Holland, Diane (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. ISSN 1753-3562.
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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) | ||||
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Subjects: | Q Science > QD Chemistry T Technology > TP Chemical technology |
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Divisions: | Faculty of Science, Engineering and Medicine > 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 | ||||
Official Date: | October 2009 | ||||
Dates: |
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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 |
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