Abstract
The powder of amorphous calcium phosphate (ACP) containing 20mass% water, prepared from aqueous solution of Ca(NO3)2 and (NH4)2HPO4, was hot-pressed hydrothermally at the temperatures from 100 to 300°C under 50 MPa for 2 h. Translucent hydroxyapatite ceramics were prepared by hydrothermal hot-pressing at 300°C. This hydroxyapatite was calcium deficient apatite with the Ca/P ratio of 1.59. In simulated body fluid, carbonate hydroxyapatite layer was formed on the surface of the translucent apatite ceramics.
