【摘要】 采用液相共沉淀方法合成了不同镉摩尔含量X_Cd（即:Cd/（Ca+Cd））的镉羟基磷灰石.通过XRD,FT-IR,FE-SEM,TG-DTG-DSC-MS和TCLP对产物的组成、形貌、热稳定性及化学稳定性进行了探讨.结果表明,随着X_Cd的增加,Cd²⁺进入到羟基磷灰石的晶格中依次形成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和Cd⁵（PO₄）₃OH;这些产物在500℃以下均可稳定存在,且热稳定性随着X_Cd的增加明显提高;毒性浸出结果显示,Cd²⁺能够进入到羟基磷灰石的晶格中,但产物的化学稳定性不高.更多还原

【Abstract】 Calcium cadmium hydroxyapatites with various Cd doping（Cd/（Cd+Ca））were synthe- sized 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 chem- ical 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.更多还原