Morphology control of hydroxyapatite through hydrothermal process

Hexagonal hydroxyapatite (HAP) has been successfully synthesized by using EDTA as chelate under hydrothermal condition. The as-prepared samples were characterized by SEM and XRD. The XRD result indicated that the products were preferentially oriented along c-axis. The SEM photographs showed that the size of the crystals was well controlled by the reaction parameters such as temperature, pH value, reaction time and the mole ratio of EDTA/Ca.