Preparation and Stability of Calcium Cadmium Hydroxyapatite

doi:10.3724/SP.J.1077.2008.01016

Abstract

Abstract: 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 Ca_3.9(Ca_4.7Cd_0.7)(PO₄)₆(OH)_1.8, Ca{_3.8(Ca_4.1Cd_0.73)(PO₄)₆(OH)_1.8, Ca_3.6(Ca_4.5Cd_0.76)(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

CLC Number:

X703

QIAN Guang-Ren,BAI Hong-Mei,SUN Fu-Cheng,ZHOU Ji-Zhi,SUN Wei-Min,XU Xia. Preparation and Stability of Calcium Cadmium Hydroxyapatite[J]. Journal of Inorganic Materials, DOI: 10.3724/SP.J.1077.2008.01016.

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Preparation and Stability of Calcium Cadmium Hydroxyapatite

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