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Dissolution kinetic and structural behaviour of natural hydroxyapatite vs. thermal treatment. Comparison to synthetic hydroxyapatite.

Abstract : The dissoln. kinetic and structural behavior of natural hydroxyapatite (N-HA) and synthetic hydroxyapatite (S-HA) was studied vs. sintering temp. and using 'in vitro' expts. Obtained results highlight the chem. stability of N-HA. Any structural modification was obsd. until 1200°C. In the fact S-HA undergoes some modifications. XRD diagrams show the tricalcium phosphate (TCP) phase formation between 800 and 1100°C and tetracalcium phosphate (TetCP) phase formation at 1200°C. The 'in vitro' assay shows that the dissoln. was occurred more in N-HA than in S-HA. The formed TCP activated the dissoln. kinetic and then the pptn. phenomena when a continuous dissoln. of TetCP leaded to slow down the kinetic pptn.
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https://hal-univ-rennes1.archives-ouvertes.fr/hal-01151566
Contributor : Laurent Jonchère <>
Submitted on : Wednesday, May 13, 2015 - 10:21:55 AM
Last modification on : Wednesday, August 26, 2020 - 10:38:04 AM

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F. Z. Mezahi, H. Oudadesse, A. Harabi, A. Lucas-Girot, Y. Le Gal, et al.. Dissolution kinetic and structural behaviour of natural hydroxyapatite vs. thermal treatment. Comparison to synthetic hydroxyapatite.. Journal of Thermal Analysis and Calorimetry, Springer Verlag, 2009, 95, pp.21--29. ⟨10.1007/s10973-008-9065-4⟩. ⟨hal-01151566⟩

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