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Low temperature consolidation of nanocrystalline apatites. Toward a new generation of calcium phosphate ceramics

Grossin, David and Dechambre, Gérard and Banu, Mihai and Sarda, Stéphanie and Rollin-Martinet, Sabrina and Drouet, Christophe and Estournès, Claude and Champion, Eric and Rossignol, Fabrice and Combes, Christèle and Rey, Christian Low temperature consolidation of nanocrystalline apatites. Toward a new generation of calcium phosphate ceramics. (2009) In: 33rd International Conference and Exposition on Advance Ceramics and Composites (ICACC 2009), 18 January 2009 - 23 January 2009 (Daytona Beach, Florida, United States).

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Abstract

Biomimetic nanocrystalline apatites analogous to bone mineral can be prepared by different ways. These non-stoichiometric compounds possess a high reactivity related to the presence of a metastable hydrated layer on the surface of the nanocrystals. The processing of such unstable phases by conventional techniques at high temperature strongly alters their physico-chemical and biological properties. Therefore, several low temperature routes have been investigated taking advantage of the structural characteristics of these compounds. Self-setting, injectable cements leading to nanocrystalline apatites have been developed. Solid mesoporous ceramic-like materials can also be obtained at low temperature by drying aqueous suspensions of nanocrystalline apatites. Among the most promising routes, however, are pressure sintering and spark plasma sintering at temperatures lower than 300°C. These techniques produce ceramics retaining most of the characteristics of the nanocrystals. The consolidation mechanism is thought to implicate the high mobility of ions within the hydrated layer. This work should be helpful for the preparation of a new generation of resorbable highly-reactive bioceramics.

Item Type:Conference or Workshop Item (Paper)
Additional Information:Thanks to Wiley Editor. This paper appears in Proceedings of the 33rd International Conference on Advanced Ceramics and Composites, ISBN: 978-0-470-57903-9, October 2009
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Ecole Nationale Supérieure de Céramique Industrielle - ENSCI (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Other partners > Université de Limoges - UNILIM (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
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Deposited By: cirimat webmestre
Deposited On:29 Oct 2014 09:47

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