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Ion exchanges in apatites. Effects on composition and properties

Cazalbou, Sophie and Eichert, Diane and Ranz, Xavier and Drouet, Christophe and Combes, Christèle and Harmand, Marie-Françoise and Rey, Christian Ion exchanges in apatites. Effects on composition and properties. (2005) Journal of Materials Science: Materials in Medicine, vol.16 (n°5). pp. 405-409. ISSN 0957-4530

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Official URL: http://dx.doi.org/10.1007/s10856-005-6979-2

Abstract

The modification of the composition of apatites materials can be made by several processes corresponding to ion exchange reactions which can conveniently be adapted to current coatings and ceramics and are an alternative to the set up of new synthesis methods. In addition to high temperature thermal treatments, which allow to virtually replace partly or totally monovalent OH- anion of stoichiometric hydroxyapatite by any halogen ion or carbonate, aqueous processes corresponding to dissolution-reprecipitation reactions have also been proposed and used. The most interesting possibilities are however provided by aqueous ion exchange reactions involving nanocrystalline apatites. These apatites are characterised by the existence on the crystal surface of a hydrated layer of loosely bound mineral ions which can be easily exchanged in solution. This layer offers a possibility to trap mineral ions and possibly active molecules which can modify the apatite properties. Such processes are involved in mineralised tissues and could be used in biomaterials for the release of active mineral species.

Item Type:Article
Additional Information:The original publication is available on http://www.springer.com/materials/structural+&+biomaterials/journal/10856
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution: Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
French research institutions > Centre National de la Recherche Scientifique - CNRS
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Deposited By:Christele COMBES

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