Elaboration of Hydroxyapatite Bioceramics by Sintering

Abstract

Thanks to its good properties of biocompatibility and bioactivity, hydroxyapatite (Ca10(PO4)6(OH) 2) is largly used to make functional materials in biomedical applications. This inorganic material can be used either as a thin film on metallic alloys or to make bulk ceramic bodies[1]. Hydroxyapatite (HAP) has also a good thermal stability and better physicochemical properties thanks to its molar ratio Ca/P which is always fixed at 1,67 [2]. Actually, the powder based on hydroxyapatite can be obtained by various methods. We chose in this work to elaboratie the HAP powder by the chemical method of double decomposition ,which is very much used by industries thanks to its facility and its moderate cost. Thereafter, the powder was characterized by diffraction of x-rays, a thermal analysis TGA-DSC, and Fourier transform infrared spectroscopy to examine its characteristics. For this part, results confirm the obtention of well crystilled one single phase. In the next step of work, we aim to develop in details the elaboration of sintered bodies based on hydroxyapatite. For that, the powder sintered at 1150 ͦ C for two hours. Scaning electron microscopy images of final samples show the presence of porous structure genertated thanks to the additifs added to the powder before sintering.