The structure of phosphate glass biomaterials from neutron diffraction and31P nuclear magnetic resonance data
- 27 September 2007
- journal article
- Published by IOP Publishing in Journal of Physics: Condensed Matter
- Vol. 19 (41) , 415116
Abstract
Neutron diffraction and P nuclear magnetic resonance spectroscopy were used to probe the structure of phosphate glass biomaterials of general composition (CaO)(NaO)(PO) (x = 0, 0.1 and 0.5). The results suggest that all three glasses have structures based on chains of Q phosphate groups. Clear structural differences are observed between the glasses containing NaO 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 [Formula: see text]. In the (CaO)(PO) glass most of the Ca ions are present in isolated CaO polyhedra whereas in the (NaO)(PO) glass the NaO polyhedra share edges leading to a Na-Na correlation. The results of the structural study are related to the properties of the (CaO)(NaO)(PO) biomaterial.Keywords
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