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        Preparation of b-Ca3(PO4)2 bioceramic powderfrom calcium carbonate and phosphoric acid q

        Yun Zhang,Guangfu Yin,Shifu Zhu,Dali Zhou,Yuehua Wang,Yong Li,Lin Luo 한국물리학회 2005 Current Applied Physics Vol.5 No.5

        When preparing b-tricalcium phosphate (b-TCP) with Ca(NO3)2 or Ca(OH)2 as the raw materials, because of the problem ofltering, it is dicult to industrialize traditional methods. In this paper,b-TCP was prepared with calcium carbonate and phospho-ric acid. According to XRD spectrum, the precursor of this system is octacalcium phosphate (OCP) [Ca8H2(PO4)6Æ5H2O] instead ofnon-stoichiometric hydroxyapatite (HA) obtained from traditional methods, and thermodynamics mechanism of the reaction wasalso studied. The crystalb-TCP powders were obtained after the precursor had been calcined at 8501150.C for 2 h. SEM imagesshowed that hardening could eliminate the reunion to a great extent, and obtain dispersiveb-TCP powders with a particle diameterbetween 0.5 and 2.0l m. The main advantages of this process over traditional methods are the fast reaction rate, the easy ltering,the ne particle size and the minimum impurity..

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