Abstract
Fluoridated hydroxyapatite (FHAp) was successfully synthesized from the starting materials of CaCO 3, CaHPO 4·2H 2O, and CaF 2 via a mechanochemical–hydrothermal route. X-ray diffraction, infrared spectroscopy, surface area measurements, and scanning electron microscopy identified the resultant powders as FHAp nanocrystals with the specific surface areas of up to 114.72 m 2/g. The mechanism study revealed that under such mechanochemical–hydrothermal conditions the formation reactions of FHAp were completed in two stages. The starting materials firstly reacted into a poorly crystallized calcium-deficient apatite and the complete incorporation of fluoride ions into apatite occurred in the second stage.
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