DOI: 10.3724/SP.J.1077.2008.01016

Journal of Inorganic Materials (无机材料学报) 2008/23:5 PP.1016-1020

Preparation and Stability of Calcium Cadmium Hydroxyapatite

Calcium cadmium hydroxyapatites with various Cd doping (Cd/(Cd+Ca))were synthesized and characterized by X-ray diffraction, FT-IR spectroscope and FESEM. TG-DTG-DSC-MS and Toxicity Characteristic Leaching Procedure (TCLP) were used to determine their thermal and chemical stability. The results show that Cd2+ enters into the hydroxyapatites crystal lattice. And with molar ratios of Cd/(Cd+Ca) increasing, there forms the phases of Ca3.9(Ca4.7Cd0.7)(PO4)6(OH)1.8, Ca3.8(Ca4.1Cd0.73)(PO4)6(OH)1.8, Ca3.6(Ca4.5Cd0.76)(PO4)6(OH)1.6, Cd5(PO4)3OH, respectively. All the calcium cadmium hydroxyapatites are thermal stable up to 500℃, and their thermal stabilities are enhanced with the increase of Cd doping, but their chemical stabilities become worse.

Key words:calcium cadmium hydroxyapatite,thermal stability,chemical stability

ReleaseDate:2014-07-21 14:20:47