基于QXRD/Rietveld法的水泥熟料中晶相与无定形相定量分析  

Quantitative Analysis of Crystal and Amorphous Phases in Clinker by QXRD/Rietveld Method

作　　者：姚武[1] 魏永起[1] 王伟[1] 

机构地区：[1]同济大学先进土木工程材料教育部重点试验室,上海201804

出　　处：《建筑材料学报》2012年第5期581-587,共7页Journal of Building Materials

基　　金：国家重点基础研究发展计划(973计划)项目(2009CB623105)

摘　　要：采用2种线吸收系数相差较大的常用内标物Al2O3和ZnO,对用QXRD/Rietveld法测定的水泥熟料各晶相含量结果进行校正,并由此推算出无定形相含量,同时对2种内标物的标定性能进行对比分析.结果表明:水泥熟料中的结晶较差相及非晶相含量(质量分数,下同)为32.3%,含量较多,不可忽略;校正后各晶相C3S,C2S,C3A和C4AF的含量分别为38.8%,15.3%,4.9%和8.7%;对于水泥样品而言,Al2O3较ZnO具有更好的标定性能.Combination of quantitative X-ray diffraction（QXRD） and the Rietveld method possesses more unexam- pled advantages over other methods in quantitative crystal phase analysis of clinker. However, there exist amor- phous phases containing poorly crystallized and non-crystal ones in clinker, resulting in the overestimated phase contents that must be eorreeted to obtain the real contents. Therefore, two internal standards, A1203 and ZnO, frequently used but obviously distinct in the linear absorption coefficient, were added into clinkers to calibrate the erystal phase contents under the same experimental conditions; and the comparison of their ability to calibrate was done. Results indicate that the fraction of amorphous phases in clinker is 32.3% （by mass） that is surprisingly high and thus ignorable, whereas other corrected crystal phase contents are 38.8% for CaS, 15.3% for C28, 4.9% for C3A and 8.7% for C4AF, and A1203 shows the better ability to calibrate than ZnO does as an internal standard in quantitative phase analysis（QPA） of clinkers.

关 键 词：Rietveld法 定量相分析 水泥熟料 内标物 

分 类 号：TU528.01[建筑科学—建筑技术科学]