采用液相共沉淀方法合成了不同镉摩尔含量Xcd(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Xcd的增加, Cd2+进入到羟基磷灰石的晶格中依次形成Ca3.9(Ca4.7Cd0 7)(PO4)6(OH)1.8,Ca3.s(Ca4 1Cd0.73)(PO4)6(OH)1,8,Ca3.6(Ca4 5Cd0.76)(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Xcd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.
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