Obtaining of hydroxyapatite powders for biomedical applications by the liquid phase deposition method
Abstract
In recent years all over the world are being developed biocompatible materials for use in traumatology,
orthopedics and dentistry. The closest of the mineral component to bone are based materials, calcium
hydroxyapatite. It is known that biological compatibility, and also interaction of hydroxyapatite with
living object as a whole depends on its chemical purity, size and morphology of its crystals. Therefore
obtaining of chemically pure synthetic analogue of bone mineral component is the actual task. In the
present work the effective producing methods of chemically pure hydroxyapatite powders with high
degree of crystallinity and a stoichiometric composition was searched. For reaching this purpose
synthesis of hydroxyapatite powders by deposition method from a liquid phase using three various
pairs of precursors (Ca(OH)2H3PO4; CaCO3 (NH4)2HPO4; Ca(NO3)2.4H2O (NH4)2HPO4), with the
subsequent analysis of their phase composition by a X-ray diffraction analysis method (XRD). The
results of analysis have demonstrated that the most effective synthesis method was that one where
precursors Ca(NO3)2.4H2O and (NH4) 2HPO4. are used Derived by this method of synthesis products
represented the chemically pure hydroxyapatite powders with high degree of crystallinity and a
stoichiometric composition.
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References
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