掺杂MgO的水泥熟料中阿利特晶型的研究  

Polymorphs of alite in cement clinker doped with MgO

作　　者：路红将[1] 刘云飞[1] 闵辉华[1] 陈虎[1] 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,江苏南京210009

出　　处：《南京工业大学学报（自然科学版）》2013年第3期46-50,共5页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：国家重点基础研究发展计划(973计划)(2009CB623101);江苏省普通高校研究生科研创新计划(CXZZ11_0322);江苏高校优势学科建设工程

摘　　要：通过X线衍射(XRD),对实验室制备的掺杂不同量MgO的熟料中阿利特的晶型进行了鉴定,发现MgO质量分数为0.5%、1.0%、1.5%和2.0%时,熟料中阿利特的晶型都为M3型。利用高分辨透射电子显微镜(HRTEM)对未掺杂MgO和质量分数为1.0%MgO的2种熟料中阿利特的晶体结构进行了研究,分析结果表明:2种熟料中的阿利特具有相同的结构特征,都存在一维调制结构,在HRTEM像中以波状衬度的形式出现,调制波矢量为q=-0.17a*+0.17b*+1.17c*,方向垂直于(1-17),波长约为(1-17)晶面间距的6倍,约为1.85 nm,确定未掺杂MgO的熟料中阿利特的晶型为M3型。Polymorphs of alite in laboratory-prepared cement clinker doped with different amounts of MgO were characterized by X-ray diffraction （XRD）. The results showed that M3 polymorph of alite in cement clinker was stabilized when doped with mass fractions of 0.5% , 1.0% ,1.5% , and 2.0% MgO, respec- tively. The crystal structures of alite in two kinds of cement clinker without doping MgO and doping mass fraction of 1.0% MgO were studied by HR TEM. The results revealed that alite in two kinds of cement clinker had the same structure characteristics. There were one-dimensional commensurately modulated structures with a modulation vector of q = -0. 17a ＊ ＋0. 17b ＊ ＋ 1.17c＊ in alite,the modulated structure could be observed in HRTEM images as wavy contrast streaking,and the structure modulation in alite was normal to （117） with the wavelength of 1.85 nm,which was 6 times greater than the spacing of （117）. It was found that M3 was stabilized in cement clinker without doping MgO in the experiment.

关 键 词：硅酸三钙 阿利特 调制结构 透射电子显微镜 

分 类 号：TB172[生物学—生物工程]