Abstract
Crystal growth kinetics of fluorapatite on hydroxyapatite seeds were studied over a range of supersaturations and solution fluoride concentrations at pH 4.5. The kinetics of this system are complicated by two additional phenomena: (i) Fluoride is exchanged for surface hydroxyl ions. (ii) At low supersaturations, growth of the crystals becomes intrinsically more difficult as growth proceeds. The kinetics were compared with classical growth models assuming linear, parabolic, and exponential dependencies of growth rate on the solution ion activity product, on the basis of the stoichiometry of the growing phase. These models were found inadequate because the experimental data, which included a wide range of nonstoichiometric solutions, clearly showed that growth is not a single valued function of ion activity product. After modifications to more appropriately account for the implied mass transfer steps, the resulting models were in much better qualitative agreement with the experimental data.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
