Li, A., Wang, D., Xiang, J., Newport, Robert J., Reinholdt, M. X., Mutin, P. Hubert, Vantelon, D., Bonhomme, Christian, Smith, Mark E., Laurencin, Danielle and Qiu, Dong. (2011) Insights into new calcium phosphosilicate xerogels using an advanced characterization methodology. Journal of Non-Crystalline Solids, Vol.357 (No.19-20). pp. 3548-3555. ISSN 00223093

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Abstract

Amorphous calcium phosphosilicate xerogels of high phosphate content were synthesized by a new sol-gel route. Their structural characterization was achieved through the combination of complementary analytical methods, including advanced solid state NMR and scattering techniques. Two representative compositions, with similar P contents but a different Ca:Si ratio, have been chosen for detailed study. Using (43)Ca solid state NMR and Ca K-edge XANES, the Ca local environment in the samples was characterized, revealing that it is similar for both compositions. It was found that P-O-Si linkages are present in both compounds after calcination at 350 degrees C. However, for the sample with the lower Si content, a higher fraction of unusual 6-coordinated silicon was observed. Interestingly, calcium was also found to enhance the network connectivity and to enter the phosphosilicate network without the need for calcination at high temperature, which is advantageous in comparison with syntheses performed previously on similar compounds.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics Q Science > QD Chemistry
Divisions:	Administration > Vice Chancellor's Office Faculty of Science > Physics
Library of Congress Subject Headings (LCSH):	Xerogels -- Structure, Calcium
Journal or Publication Title:	Journal of Non-Crystalline Solids
Publisher:	Elsevier Science BV
ISSN:	00223093
Official Date:	October 2011
Volume:	Vol.357
Number:	No.19-20
Number of Pages:	8
Page Range:	pp. 3548-3555
Identification Number:	10.1016/j.jnoncrysol.2011.07.003
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Funder:	Zhongguo ke xue yuan [Chinese Academy of Sciences] (CAS), Guo jia zi ran ke xue ji jin wei yuan hui (China) [National Natural Science Foundation of China] (NSFC), Engineering and Physical Sciences Research Council (EPSRC), Royal Society (Great Britain), Seventh Framework Programme (European Commission)
Grant number:	KJCX2-YW-H19 (CSA), 91027032 (NNSFC), EP/C004671 (EPSRC), EP/C004698 (EPSRC), EP/C515560 (EPSRC), JP090313 (RS)
URI:	http://wrap.warwick.ac.uk/id/eprint/38740

Data sourced from Thomson Reuters' Web of Knowledge

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