Abstract
Porous sheets of hydroxyapatite (Ca10(PO)4(OH) 2; HA) with about 50 μm to 1 mm in thickness and porous HA granules of about 50 μm to 1 mm in size with tailored crystal surface were prepared by the hydrothermal vapor exposure method at the temperatures above 105 °C under saturated vapor pressure of pure water. Porous HA sheets with about 75 % porosity prepared at 120 °C were composed of rod-shaped crystals of about 30 μm in length. Porous HA granules prepared at 160 °C were also composed of rod-shaped crystals of about 20 μm in length with the mean aspect ratio of 30. These crystals were elongated along the c-axis. Rod-shaped HA crystals were locked together to make micro-pores of about 0.1 μm in size. Both of materials were non-stoichiometric HA with calcium deficient composition. These materials must have the advantage of adsorptive activity, because they had large specific crystal surface and much micro-pores.
| Original language | English |
|---|---|
| Pages (from-to) | 521-524 |
| Number of pages | 4 |
| Journal | Key Engineering Materials |
| Volume | 288-289 |
| Publication status | Published - 2005 |
| Externally published | Yes |
Keywords
- Artificial bone
- Crystal
- Hydrothermal
- Hydroxyapatite
- Porous material
ASJC Scopus subject areas
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering