Fabrication of Bioactive High Porous Hydroxyapatite Ceramics

Abstract

The main subject of this study was to produce a net shaped micro porous hydroxyapatite ceramics. For this aim, initially fabrication of hydroxyapatite powder was achieved by a thermal extraction method which is inexpensive processing route. Phase determination of the yield of the process was carried out by X-ray diffraction method. Replica technique was used to produce a reticulated structure from hydroxyapatite powder. The foams were produced with various rates of additive as binder and additive-free compositions. After the HAp daubed on surfaces of substrate polymer was fired and sintered in the process at > 1100°C. The obtained ceramic foam was characterized using optical microscopy. The preform exhibited different pore sized structures depending binder rate and sintering temperature. As a result, hydroxyapatite preforms was produced with high porosity and their properties were improved by adding the binder which supports biocompability of HAp.