%0 Journal Article %T Dissolution kinetic and structural behaviour of natural hydroxyapatite vs. thermal treatment. Comparison to synthetic hydroxyapatite. %+ Institut des Sciences Chimiques de Rennes (ISCR) %+ Ceramics Laboratory (CL-MU) %+ Laboratoire de génie des Procédés %A Mezahi, F. Z. %A Oudadesse, H. %A Harabi, A. %A Lucas-Girot, A. %A Le Gal, Y. %A Chaair, H. %A Cathelineau, G. %< avec comité de lecture %@ 1388-6150 %J Journal of Thermal Analysis and Calorimetry %I Springer Verlag %V 95 %P 21--29 %8 2009 %D 2009 %R 10.1007/s10973-008-9065-4 %K hydroxyapatite thermal treatment dissoln pptn bioceramic bone substitute %Z Chemical Sciences/Organic chemistryJournal articles %X 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. %G English %L hal-01151566 %U https://univ-rennes.hal.science/hal-01151566 %~ UNIV-RENNES1 %~ CNRS %~ INSA-RENNES %~ ENSC-RENNES %~ ISCR %~ SCR_MACSE %~ SCR_VC %~ ISCR-CSM %~ STATS-UR1 %~ UR1-SPM %~ INC-CNRS %~ UR1-UFR-SPM %~ UR1-HAL %~ UR1-SDLM %~ UR1-SDLMJONCH %~ IVER %~ TEST-UNIV-RENNES %~ TEST-UR-CSS %~ UNIV-RENNES %~ INSA-GROUPE %~ UR1-MMS %~ TEST2-HALCNRS