Abstract
The purpose of this paper is to report on hydrothermal synthesis of hydroxyapatite solid solutions with vanadate, Ca10(PO4)6-x(VO4)x(OH)2. We investigated effects of NaOH concentration (0.4-1.2 M) and reaction temperature (30-225°C) on the formation of Ca10(PO4)2(VO4)4(OH)2 powder. The prepared powders were characterized using elemental analysis, X-ray diffraction, and TEM observation. The white Ca10(PO4)2(VO4)4(OH)2 powders were hydrothermally synthesized using aqueous solutions of NaOH concentration more than 0.9 M. The particle size increased from 16.4 nm (30°C) to 71.1 nm (225°C) with increasing the reaction temperature without changing the crystal structure and morphology.
