求高手帮忙分析这张XRD图谱!!!

2024-12-07 14:48:20
推荐回答(2个)
回答(1):

分析XRD图谱,必须用到pdf卡片,一般都是使用MDI Jade软件进行处理。而你看到的那些峰,实际上就是晶胞晶面的衍射峰。你会经常在文献上看到别人的XRD图衍射峰上有“某某物质(111)”指的就是这个衍射峰是某某物质的111晶面衍射峰。
你要的结果是谱图的定性分析,定量分析一般不会用XRD来标准,主要使用EDS等表征。
进行定性分析:当你安装了pdf卡片后,可以在Jade中右键点击“pdf”,然后选出你非常确定有的元素。之后数据库会把有含这些元素的所有物资已有pdf卡片列出来,里面有其衍射峰及晶胞参数等。你在里面寻找到合适那些,一个一个点击。会出现衍射峰与你的峰来匹对。
如果一个物质有多个峰匹对成功,可以确定你的产品含有这种物质。如果有多种物质,一般都是一样一样匹对。一个物质命中一些峰,另一些命中一些峰。其中最主要的是要看你谱图的三强峰,只要三强峰匹对成功,一般认为这个物质就是它了。
看不到你的图,如果你的图信噪比很低,杂峰太多可能对匹对有一定影响。如果信噪比很高,说明结晶度很好。
最后你这张图的格式是jpg等图片格式,那么对不起,你已经没得用pdf卡片匹对了。因为MDI Jade软件只读raw软件。还有一些软件读jip格式的文件,这些都是当初打谱的人做的。你如果想要Jade、pdf、以及相关教程,可以直接到新浪资料上去搜。
pdf卡片下载:共11个压缩包,大小150M,解压后是个安装程序,安装完后有1G多的pdf数据。
http://ishare.iask.sina.com.cn/f/13986270.html?from=dl&retcode=0
教程可以直接到百度文库,或新浪资料上下载,非常多。软件上面也有。
如果没有注册,我也可以发给你,或者你有原始数据raw格式,需要做成origin图片。标出物质和晶面,也可以发给我试试。

回答(2):

方法一:用jade 5.0或者6.0,很复杂,最好找相关文献

方法二:人工解析
第一步,你先去把可能物质的标准PDF卡片找出来,标出那三种物质的晶系,晶格常数等信息,PDF卡片上都有。
第二步,用内标法或者K值法算样品中各种晶相的百分含量。内标法要做内标曲线,K值法会简单点。
第三步,根据你样品中不同晶相所对应的晶面间距公式和布拉格方程求出各自的晶格常数。
第四步,根据谢乐公式求解三种晶相各自的晶粒尺寸

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