Stoichiometry and particle morphology effects on the aptitude to compaction of apatitic structure powders

Abstract : Apatitic calcium phosphates powders with Ca/P molar ratio of 1.5 to 1.8 were synthesized at 25 degrees C using the neutralization method. These powders, differing by stoichiometry and particle morphology, were compacted in similar conditions. For a similar morphology of particles, compacts of the non-stoichiometric powders have better cohesion than those of the stoichiometric hydroxyapatite (Ca-10(PO4)(6)(OH)(2): Ca/P=11.67). The lacunar structure, with deficiency of calcium (Ca10-x (HPO4)(x)(PO4)(6-x)(OH)(2-x): 1.5
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Z. Hatim, Abderrahim Michrafy, M. Elassfouri, F. Abida. Stoichiometry and particle morphology effects on the aptitude to compaction of apatitic structure powders. Powder Technology, Elsevier, 2009, 190 (1-2, SI), pp.210-214. ⟨10.1016/j.powtec.2008.04.040⟩. ⟨hal-01718078⟩

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