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Structure and thermal properties of yttrium alumino-phosphate glasses

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Martin, Richard A., Salmon, P. (Philip), Carroll, Donna L., Smith, Mark E. and Hannon, Alex C. (2008) Structure and thermal properties of yttrium alumino-phosphate glasses. In: 13th Conference on Liquid and Amorphous Metals, Ekaterinburg, Russia, Jul 08-14, 2007. Published in: Journal of Physics: Condensed Matter, Volume 20 (Number 11). Article No. 115204. doi:10.1088/0953-8984/20/11/115204 ISSN 0953-8984.

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Official URL: http://dx.doi.org/10.1088/0953-8984/20/11/115204

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Abstract

The structure and thermal properties of yttrium alumino-phosphate glasses, of nominal composition (Y2O3)(0.31-z)(Al2O3)(z)(P2O5)(0.69) with 0 less than or similar to z less than or similar to 0.31, were studied by using a combination of neutron diffraction, Al-27 and P-31 magic angle spinning nuclear magnetic resonance, differential scanning calorimetry and thermal gravimetric analysis methods. The Vickers hardness of the glasses was also measured. The data are compared to those obtained for pseudo-binary Al2O3-P2O5 glasses and the structure of all these materials is rationalized in terms of a generic model for vitreous phosphate materials in which Y3+ and Al3+ act as modifying cations that bind only to the terminal (non-bridging) oxygen atoms of PO4 tetrahedra. The results are used to help elucidate the phenomenon of rare-earth clustering in phosphate glasses which can be reduced by substituting Al3+ ions for rare-earth R3+ ions at fixed modifier content.

Item Type: Conference Item (UNSPECIFIED)
Subjects: Q Science > QC Physics
Q Science > QD Chemistry
Divisions: Administration > University Executive Office
Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH): Yttrium phosphates, Glass -- Thermal properties, Aluminum oxide
Journal or Publication Title: Journal of Physics: Condensed Matter
Publisher: Institute of Physics Publishing Ltd.
ISSN: 0953-8984
Official Date: 19 March 2008
Dates:
DateEvent
19 March 2008Published
Volume: Volume 20
Number: Number 11
Number of Pages: 13
Page Range: Article No. 115204
DOI: 10.1088/0953-8984/20/11/115204
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Funder: Engineering and Physical Sciences Research Council (EPSRC)
Title of Event: 13th Conference on Liquid and Amorphous Metals
Type of Event: Conference
Location of Event: Ekaterinburg, Russia
Date(s) of Event: Jul 08-14, 2007

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