Abstract
A systematic study of the stability of potassium/carbonate co-substituted hydroxyapatite has been carried out, with samples synthesized by aqueous precipitation according to the charge-balanced mechanism:
Ca10-xKx(PO4)(6-x)(CO3)(x)(OH)(2)
Samples up to x=1.0 were prepared and their stability determined by heating at a range of temperatures in both air and CO2 environments. Results showed that whilst samples up to x=1.0 can be prepared phase-pure, the stability of these materials is strongly dependent on sintering temperature with the full range of compositions only being stable at 600 degrees C in CO2. The c unit cell parameter increases linearly with x, and, for a fixed composition, decreases linearly with temperature indicating loss of carbonate from the A-site. FTIR showed that samples contained carbonate at both A- and B-sites, and that carbonate content increased with x.
| Original language | English |
|---|---|
| Title of host publication | Bioceramics |
| Editors | Guy Daculsi, Pierre Layrolle |
| Place of Publication | Zurich, Switzerland |
| Publisher | Trans Tech Publications Ltd |
| Pages | 207-210 |
| Number of pages | 4 |
| Volume | 20 |
| Edition | 1-2 |
| ISBN (Print) | 087849457X, 978-0878494576 |
| DOIs | |
| Publication status | Published - 30 Mar 2008 |
| Event | 20th International Symposium on Ceramics in Medicine - Nantes, France Duration: 24 Oct 2007 → 26 Oct 2007 |
Publication series
| Name | Key Engineering Materials |
|---|---|
| Publisher | Trans Tech Publications Ltd |
| Volume | 361-363 |
| ISSN (Print) | 1013-9826 |
Conference
| Conference | 20th International Symposium on Ceramics in Medicine |
|---|---|
| Country/Territory | France |
| City | Nantes |
| Period | 24/10/07 → 26/10/07 |
Keywords
- hydroxyapatite
- potassium
- carbonate
- substitution
- X-ray diffraction