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The structure of phosphate glass biomaterials from neutron diffraction and P-31 nuclear magnetic resonance data
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Pickup, D. M., Ahmed, I., Guerry, P., Knowles, J. C., Smith, Mark E. and Newport, R. J. (2007) The structure of phosphate glass biomaterials from neutron diffraction and P-31 nuclear magnetic resonance data. In: International Workshop on Current Challenges in Liquid and Glass Science, Abingdon, England, JAN 10-12, 2007. Published in: Journal of Physics-Condensed Matter, Vol.19 (No.41). Article: 415116. doi:10.1088/0953-8984/19/41/415116 ISSN 0953-8984.
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Official URL: http://dx.doi.org/10.1088/0953-8984/19/41/415116
Abstract
Neutron diffraction and P-31 nuclear magnetic resonance spectroscopy were used to probe the structure of phosphate glass biomaterials of general composition (CaO)(0.5-x) (Na2O)(x) (P2O5)(0.5) (x = 0, 0.1 and 0.5). The results suggest that all three glasses have structures based on chains of Q(2) phosphate groups. Clear structural differences are observed between the glasses containing Na2O and CaO. The P-O bonds to bridging and non-bridging oxygens are less well resolved in the neutron data from the samples containing CaO, suggesting a change in the nature of the bonding as the field strength of the cation increases Na+ -> Ca2(+). In the (CaO)(0.5)(P2O5)(0.5) glass most of the Ca2+ ions are present in isolated CaOx polyhedra whereas in the (Na2O)(0.5) (P2O5)(0.5) glass the NaOx polyhedra share edges leading to a Na-Na correlation. The results of the structural study are related to the properties of the (CaO)(0.4) (Na2O)(0.1) (P2O5)(0.5) biomaterial.
Item Type: | Conference Item (Paper) | ||||
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Subjects: | Q Science > QC Physics | ||||
Divisions: | Administration > University Executive Office Faculty of Science, Engineering and Medicine > Science > Physics |
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Journal or Publication Title: | Journal of Physics-Condensed Matter | ||||
Publisher: | IOP Publishing | ||||
ISSN: | 0953-8984 | ||||
Official Date: | 17 October 2007 | ||||
Dates: |
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Volume: | Vol.19 | ||||
Number: | No.41 | ||||
Number of Pages: | 8 | ||||
Page Range: | Article: 415116 | ||||
DOI: | 10.1088/0953-8984/19/41/415116 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Conference Paper Type: | Paper | ||||
Title of Event: | International Workshop on Current Challenges in Liquid and Glass Science | ||||
Type of Event: | Workshop | ||||
Location of Event: | Abingdon, England | ||||
Date(s) of Event: | JAN 10-12, 2007 |
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