Effect of heat treatment on microstructure characteristics of spheroidal fluorapatite nano particles synthesized via mechanochemical method

In this paper, synthesis and characterization of nanostructured fluorapatite via mechanochemical process was investigated. For this aim, the initial powders with given stoichiometric proportionality were mixed in polymeric vial using a high energy planetary ball mill. The characterizations and structural features of synthesized powders were evaluated by powder X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, energy dispersive Xray spectroscopy (EDX), and transmission electron microscopy (TEM). Results revealed that the thermal treatment led to the improvement of crystallinity degree. Also, heat treatment at 600° C did not affect on phase transitions and the crystallite size and the lattice strain of product reached to the 36 ± 3 nm and 0.291 %, respectively.