Preparation and study of the structural, physical and mechanical properties of hydroxyapatite nanocomposite

Abstract

In this research, a new method has been adopted in preparing nanocomposite hydroxyapatite from natural sources, as the preparation method is characterized by being inexpensive. The compound prepared has a high biological compatibility for use in medical applications in orthopedics and dentistry. Hydroxyapatite was prepared from cow bones, where it was used as a primary raw material, and the preparation was performed by calcination method at a temperature of (750 °C) for three hours. The results were found by conducting an x-ray diffraction examination that the compound formed is hydroxyapatite, the crystalline treatments, and its chemical symbol is (Ca10(PO4)6(OH2)).also, the analysis of Hydroxyapatite powder prepared by X-ray Fluorescence was performed and the ratio of phosphorous to calcium was found (Ca/P = 1.67), and this ratio is consistent with the normal ratio present in the bone, indicating that the prepared compound has a high biological compatibility. The samples prepared were imaged by using Scanning Electron Microscope technique. In order to know the average grain size, and study surface roughness coefficients, the Atomic Force Microscope(AFM) was used, we found that the prepared hydroxyapatite has nanoscale sizes, where the average grain size is about (60 nm). Some physical and Mechanical properties of were studied for some sample that were prepared using the axial compression method, which were sintered at temperature of (1350 °C) for three hours.