MgO掺杂阿利特的结构演变及其调制结构表征(英文)  

Structural Evolution and Characterization of Modulated Structure for Alite Doped with MgO

作　　者：闵辉华[1] 刘云飞[1] 朱健民[2] 吕忆农[1] 

机构地区：[1]南京工业大学材料科学与工程学院,材料化学工程国家重点实验室,南京210009 [2]南京大学物理系,固体微结构国家重点实验室,南京210093

出　　处：《无机化学学报》2012年第11期2444-2450,共7页Chinese Journal of Inorganic Chemistry

基　　金：国家重点基础研究发展计划(No.2009CB623101);江苏省普通高校研究生科研创新计划(No.CXZZ11_0322);江苏高校优势学科建设工程资助项目

摘　　要：利用X射线衍射(XRD)和透射电子显微镜(TEM)对不同MgO掺量的阿利特结构演变进行了研究。结果表明:当MgO掺量为0.5wt%时,T1和M1型共存;当MgO掺量为1.0wt%时,稳定为M1型;当MgO掺量在1.5wt%以上时,稳定为M3型。基于XRD数据计算得到了不同晶型阿利特的伪六方亚晶胞参数,结果显示各晶型的亚晶胞参数值非常接近。通过选区电子衍射(SAED)和高分辨透射电子显微像(HRTEM)对各晶型中的调制结构进行了观察。结果表明:各晶型阿利特中的超晶胞反射斑点坐标均可用相应的线形表达式描述,调制结构可以在HRTEM像中观察到,并以波状衬度的形式展现,其方向平行于亚晶胞中相应的晶面。Structural evolution for alite with various doping amounts of MgO was investigated via X-ray diffraction （XRD） and transmission electron microscopy （TEM）. T1 and M1 coexist in alite with MgO doping of 0.5wt%, M1 was stabilized with MgO doping of 1.0wt%, and M3 was stabilized with MgO doping above 1.5wt%. The pesudohexagonal subcells lattice constants of all the modifications were calculated based on XRD data, and they were nearly identical. Modulated structures in each modification were observed via selected area electron diffraction （SAED） and high resolution transmission electron microscopy （HRTEM）. The coordinates of the supercell reflections in various modifications were described as relative linear expressions and the modulated structures were observed in HRTEM images as wavy contrast streakings parallel to the corresponding subcell planes.

关 键 词：阿利特 调制结构 透射电子显微镜 结构演变 

分 类 号：TQ172[化学工程—水泥工业]