Synthesis and characterization of fluorine-containing hydroxyapatite by a pH-cycling method.
Different fluorine-containing hydroxyapatite (FHA) powders were synthesized through a pH-cycling method by varying sodium fluoride (NaF) concentration in hydroxyapatite (HA) suspensions. The powders were then calcined at 1200 ( composite function)C for 1 h. Both uncalcined and calcined powders were characterized using X-ray diffraction (XRD), Fourier transform infra-red (FTIR), and F-electrode. It was discovered that fluorine incorporation increased with the fluorine content in the initial solution and the number of pH cycles employed. A relatively low fluorine incorporation efficiency, approximately 60%, was attained for most of the FHA samples, and it did not vary significantly after calcination. It was also revealed that the FHA particles produced by the pH-cycling method were inhomogeneous. They were a mixture of hydroxyapatite and F-rich apatite (or FA) particles. After calcination, however, these FHA particles were homogenized and became single phased FHA.
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Department of Metallurgy and Materials Engineering, University of Connecticut, 97 North Eagleville Road, Box U-136, Storrs, CT, 06269-3136, USA.
Wei
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M
D018786:Bone Substitutes / Q000032:analysis / Q000737:chemistry*; D003460:Crystallization / Q000379:methods*; D017886:Durapatite / Q000032:analysis / Q000737:chemistry*; D005461:Fluorine / Q000032:analysis / Q000737:chemistry*; D006358:Hot Temperature; D006863:Hydrogen-Ion Concentration; D008422:Materials Testing; D011208:Powders; D012996:Solutions
D018786:Bone Substitutes; D011208:Powders; D012996:Solutions; D005461:Fluorine; D017886:Durapatite
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