Hydroxyapatite Powder Prepared by Sol-Gel Method for Biomedical Applications

Abstract

This investigation is focused on the production of hydroxyapatite (HA) powder and the impact of calcination temperature on the crystalline structure of HA. This work involved the chemical synthesis of HA powder utilizing stoichiometric ratios of the initial ingredients, followed by gel formation, drying, crushing, and calcination at temperatures ranging from 600°C to 800°C. Samples sintered at 600°C and 800°C were examined for their mechanical characteristics, such as Vickers microhardness and Young's modulus. The results demonstrated that higher sintering temperatures improved crystallinity and stiffness via increasing microhardness and Young's modulus. The synthetic HA powder's polycrystalline nature was confirmed by x-ray diffraction (XRD) examination, with the main peak exhibiting the maximum crystallinity. Debye-equation Scherrer's formula was used to get the average crystallite size. The investigation of hydroxyapatite functional groups using Fourier-transform infrared spectroscopy (FTIR) revealed distinctive peaks.