Abstract
A new method to synthesize the carbonate substituted hydroxyapatite (CHA) powder has been set up introducing a CO2 flux, as a source of carbonate, in the HA synthesis process based on the neutralization reaction between Ca(OH)2 and H3PO4; the Ca/P molar ratio of the starting reactants has been fixed at the stoichiometric value of hydroxyapatite (1.67). The reactants are abundant and inexpensive, the yield is good compared to other CHA powder synthesis, the reaction may be performed at low temperature and without pH control and does not produce any by-products that have to be disposed off: these are all things of great interest for an industrialisation of the process. The influence of the synthesis parameters (temperature, H3PO4 solution dropping rate, i.e. reaction time, CO2 flux, aging time) has been tested to optimise the process conditions in order to obtain the highest carbonation degree and favour the B-type CHA precipitation in respect to A-type one.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 2071-2074 |
| Number of pages | 4 |
| Journal | Key Engineering Materials |
| Volume | 264-268 |
| Issue number | III |
| DOIs | |
| State | Published - 2004 |
| Event | Proceedings of the 8th Conference and Exhibition of the European Ceramic Society - Istanbul, Turkey Duration: Jun 29 2003 → Jul 3 2003 |
Keywords
- Biomaterial
- Biomimetic carbonation
- Carbonate apatite
- Synthesis
ASJC Scopus subject areas
- Ceramics and Composites
- Chemical Engineering (miscellaneous)