The Effect of Rotation Speed and Time of Milling on Synthesis and Properties of Fluoridated Hydroxyapatite Biomaterial

Synthetic hydroxyapatite (ha) is the most helpful because of its similarity tonatural bone in both crystalline structure and chemical composition . recently,fluoridated hydroxyapatite (fha) has been developed in dental and orthopedicapplication because it has lower solubility than pure ha, while maintaining thecomparable bioactivity and biocompatibility. the aim of this study was to synthesisand characterizes fha nanopowder via mechanochemical activation method. alsothe effect of milling time and rotation speed on its properties was investigated.calcium hydroxide, phosphorous oxide and calcium fluoride powder were used forsynthesis of fha. the math ratio of balls to reactant was 30. mechanochemicalreaction was performed in the planetary ball mill at two rotating speed 300 and 250rpm. zirconia ball and zirconi a vial were used to perform the mechanochemicalprocess. x-ray diffraction, ftir spectroscopy and scanning electron microscopywere utilized to characterize fha nanopowder. the results showed that the synthesisof fha after 6 h ball milling at 300 rpm or 10 h milling at 250 rpm was complet,