摘要
以磷酸氢二氨[(NH4)2HPO4]、四水硝酸钙[Ca(NO3)2·4H2O]和四水硝酸铅[Pb(NO3)2·4H2O]为原料,在200℃水热处理12h制得Ca10-xPbx-HA[x=0～10,Ca-Pb-Ca10(PO4)6(OH)2,Ca-Pb-hydroxyapatite,Ca-Pb-HA]固溶体。通过X射线衍射、化学分析方法以及电子显微镜对Ca-Pb-HA固溶体的晶相、化学组成和形貌进行了分析。利用Rietveld方法对Ca-Pb-HA固溶体进行了结构精修,结果表明:晶体结构随铅离子固溶量的增大发生了较大的变化,晶胞参数a和c不随铅离子含量的变化而呈线形变化。在Ca-Pb-HA固溶体中铅离子优先占据M(2)位置。Rietveld分析结果很好地解释了Ca-Pb-HA固溶体结构随铅离子含量的变化规律。
Ca10-xPbx-hydroxyapatite(Ca-Pb-HA,x=0-10) was successfully synthesized by the hydrothermal method at 200 ℃ for 12 h using(NH4)2HPO4,Ca(NO3)2·4H2O and Pb(NO3)2·4H2O as reagents.The samples were characterized by the X-ray diffraction,chemical analysis and scanning electron microscope,and the site of the metal ions in the solid solutions was analyzed by the Rietveld method.The crystal structure varies significantly with the increase in the amount of Pb content.The lattice constants,both a and c,of the solid so...
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2009年第3期420-425,共6页
Journal of The Chinese Ceramic Society
基金
教育部重大项目培育资金(707031)
江苏省自然科学基金(BK2007200)资助项目
关键词
羟基磷灰石
铅
晶胞参数
离子占位
水热法
hydroxyapatite
lead
lattice parameter
ion occupancy
hydrothermal method
