Abstract
The calcined hydroxyapatite (HAp) nano-crystals having good dispersibility in media were successfully prepared by the calcination of low crystallized HAp particles at 800°C for 1 h in the presence of poly(acrylic acid calcium salt) (PAA-Ca) coated on the particle surfaces, and subsequent removal of CaO, which was the thermal decomposed product of PAA-Ca. In the case of the calcination without PAA-Ca, large agglomerates consisting of sintered HAp polycrystals were observed after the product was dispersed in ethanol medium. On the other hand, in the case of the calcination with PAA-Ca coated on the particle surfaces, the size of the HAp crystal dispersed in ethanol medium was corresponded to that of the HAp single crystal determined from electron micrographs, which indicates that the sintering among the HAp particles during the calcination could be avoided by preventing the contact among the HAp particles by PAA-Ca coating.
| Original language | English |
|---|---|
| Number of pages | 1 |
| Publication status | Published - Dec 1 2005 |
| Externally published | Yes |
| Event | 54th SPSJ Annual Meeting 2005 - Yokohama, Japan Duration: May 25 2005 → May 27 2005 |
Other
| Other | 54th SPSJ Annual Meeting 2005 |
|---|---|
| Country/Territory | Japan |
| City | Yokohama |
| Period | 5/25/05 → 5/27/05 |
Keywords
- Acrylic acid
- Composite
- Covalent bonding
- Nano-sized hydroxyapatite particle
- Sintering
ASJC Scopus subject areas
- Engineering(all)