Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy

Hydroxyapatite (HAP) nanopowders were synthesized by molten salt method at 260 ◦ C. The as-prepared powders were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscope (SEM) and thermo gravimetric analysis (TGA). With the aid of the obtained results the effect of calcining time on the crystallinity, size and morphology of HAP nanopowders is pre- sented. The HAP nanopowders synthesized by molten salt method consist of pure phase of HAP without any impurities and showed the rod-like morphology without detectable decomposition up to 1100 ◦C.