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Sol-gel produced sodium calcium phosphosilicates for bioactive applications: synthesis and structural characterisation

Carta, Daniela, Newport, RJ, Knowles, JC and Smith, ME (2011) Sol-gel produced sodium calcium phosphosilicates for bioactive applications: synthesis and structural characterisation Materials Chemistry and Physics, 130. pp. 690-696.

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Abstract

A series of phosphosilicates P2O5 (45 mol%)–CaO (20–40 mol%)–Na2O (5–20 mol%)–SiO2 (10–15 mol%) has been synthesised by the sol–gel route using PO(OH)3−x(OC2H5)x (x = 1, 2) as the phosphorus precursor. Evolution ofthe gels with temperature was studied using thermogravimetric analysis and differential thermal analysis. These phosphosilicates show good stability against crystallisationremaining fully amorphous even after calcination at 400 ◦C. The short-range structure of the stabilised sol–gel glasses and the effect of adding modifier oxides to the network structure have been investigated using a combination of techniques: FT-IR spectroscopy, 31P magic angle spinning NMR, high energy XRD and P L-edge XANES.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Chemistry
Authors :
NameEmailORCID
Carta, Danielad.carta@surrey.ac.ukUNSPECIFIED
Newport, RJUNSPECIFIEDUNSPECIFIED
Knowles, JCUNSPECIFIEDUNSPECIFIED
Smith, MEUNSPECIFIEDUNSPECIFIED
Date : 9 August 2011
Identification Number : 10.1016/j.matchemphys.2011.07.050
Copyright Disclaimer : © 2011 Elsevier B.V. All rights reserved
Uncontrolled Keywords : Sol–gel; Phosphosilicate glasses
Depositing User : Jane Hindle
Date Deposited : 31 Aug 2017 12:53
Last Modified : 31 Aug 2017 12:53
URI: http://epubs.surrey.ac.uk/id/eprint/842102

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