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The structure of phosphate glass biomaterials from neutron diffraction and 31P nuclear magnetic resonance data

Pickup, David M., Ahmed, Ifty, Guerry, Paul, Knowles, Jonathan C., Smith, Mark E., Newport, Robert J. (2007) The structure of phosphate glass biomaterials from neutron diffraction and 31P nuclear magnetic resonance data. Journal of Physics: Condensed Matter, 19 (41). ISSN 0953-8984. (doi:10.1088/0953-8984/19/41/415116) (KAR id:37656)

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http://dx.doi.org/10.1088/0953-8984/19/41/415116

Abstract

Neutron diffraction and 31P 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 Q2 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: Article
DOI/Identification number: 10.1088/0953-8984/19/41/415116
Subjects: Q Science > QC Physics
Divisions: Divisions > Division of Natural Sciences > Physics and Astronomy
Depositing User: Robert Newport
Date Deposited: 18 Dec 2013 15:38 UTC
Last Modified: 16 Nov 2021 10:14 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/37656 (The current URI for this page, for reference purposes)
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