Influence of the polysaccharide galactomannan on the dielectrical characterization of hydroxyapatite ceramic

Hydroxyapatite (HAP), Ca10(PO4)6(OH)2, has a wide range of biomedical applications because it is excellent biocompatibility and similar to natural bone tissue. The synthesis of the nanocrystalline powders of hydroxyapatite (HAP) was developed by the high energy method of dry mechanical alloying. The Ca(OH)2 and CaHPO4 were used in the preparation. Galactomannans are polysaccharides that occur in the endosperm of the seeds of leguminous plants as cell wall storage components was obtained from seeds of Adenanthera pavonina L. family Leguminosae (Fabaceae) and subfamily Mimosoideae. The nanocrystalline powders of hydroxyapatite were mixed with 10% (Gal 90), 20% (Gal 80) and 30% (Gal 70) of galactomannan. The aim of the study was to investigate influence of the galactomannan on the electrical characterization of bioceramic materials based on hydroxyapatite. The samples were studied by X-ray diffraction (XRD) was recorded to confirm the formation of a single phase solid solution and comportment this phase through the Rietveld analysis, scanning electron microscopy (SEM) and Dielectric measurements in the 10 Hz-100 MHz frequency range, at room temperature, have been performed. The presence of nanocrystals was confirmed by X-ray diffraction of HAP with size crystallite of 110 nm.