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Insights into new calcium phosphosilicate xerogels using an advanced characterization methodology
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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. doi:10.1016/j.jnoncrysol.2011.07.003
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Official URL: http://dx.doi.org/10.1016/j.jnoncrysol.2011.07.003
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 | ||||
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| Subjects: | Q Science > QC Physics Q Science > QD Chemistry |
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| Divisions: | Administration > Vice Chancellor's Office Faculty of Science > Physics |
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| 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 | ||||
| Dates: |
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| Volume: | Vol.357 | ||||
| Number: | No.19-20 | ||||
| Number of Pages: | 8 | ||||
| Page Range: | pp. 3548-3555 | ||||
| DOI: | 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) |
Data sourced from Thomson Reuters' Web of Knowledge
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