使用瑞利散射的理论强度进行异常形状修正的薄膜样品X射线荧光分析

对于异常形状薄膜样品 ,存在着X射线荧光强度不足、分析位置不固定、定量值偏低的问题。借鉴原来在工作曲线法中采用过的 ,使用荧光X射线与散射X射线的强度比进行形状修正的方法 ,将此方法用于FP法 ,得到的良好结果     

同位素X射线荧光分析技术在汞锑矿的应用研究

本文主要介绍了利用同位素X射线荧光分析方法在陕西青铜沟汞锑矿对汞锑元素分析的方法研究与应用效果。阐述了如何用X荧光分析方法同时进行汞锑两种元素分析,并证明了这一方法在该矿山应用的可行性。通过对室内样品定量测量效果来看,还可以解决矿车在线矿石品位半定量计算,以及坑道巷道中代替刻槽取样等指导性工作。     

1420冷轧机组测厚仪系统缺陷分析与改进

通过对宝钢分公司1420冷轧X射线测厚仪系统的研究,破译测厚仪的通信黑匣子,建立了通用通信平台,提出一套X光源寿命预测的方法,解决了影响生产的瓶颈问题,做到预防维修,大大减少故障时间,提高了测厚仪设备现场应用的整体性能与水平.     

本钢薄板坯连铸生产APIX65管线钢

介绍了本钢采用转炉→炉外精炼→薄板坯连铸连轧生产管线钢X65的情况。试验结果、产品的机能达到APIX70标准要求。经西安管材研究所评定，各项指标均达到了西气东输管线标准的要求，效果理想，并具有抗HIC性能。     

Effect of Interstitial Atom Nitrogen on Properties of RE2Fe17 Compounds

The electronic structure and atomic magnetic moments of clusters NdFe6, NdFe6N3 and Fe8 with a dumbbell atom-pair in rare earth-transition element compounds NdEFe17Nx(x=0, 3) were studied by spin-polarized MS-Xα method. The results are as follows: There are three negative exchange couplings between Fe(c) and Fe(f) atoms in Nd2Fe17, which occur at their odd parity orbitals. Compared to the results of α-Fe calculated by the MS-Xα method, the low Curie temperature of compounds RE2Fe17 can be explained satisfactorily. (2) There is only one weaker negative exchange coupling orbital leaving in between Fe(c) and Fe(f) sites in Nd2Fe17N3. These results may be helpful for understanding the effect of interstitial atom M(M=N, H or C) in Fe2Fe17Mx on Curie temperature. The other key factors affecting the Fe-Fe exchange coupling in Fe2Fe17 compounds were also discussed.     

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The influence of heating temperature and holding time of different Ti content of microalloy high strength steel on austenite grain size and the influence of the precipitation characteristics on mechanical properties were quantificationally investigated through the methods of metallography, phase analysis and X-ray diffraction. The results show that, under the heating temperature of 1000-1150?? and the same soaking time,the steel B has small size of austenite grain. However when the temperature rises to 1150?? and above, austenite grain size in steel B increases fast, bulky containing Ti precipitates almost have no side effect on austenitic grain growth. With Ti content in steel increasing, MC precipitated phase in steel A and B respectively is 7. 5%, 159. 0% of the total M3C precipitated phase. When the ratio of MC/M3C increases, the corresponding strength of steel also increases. The mass fraction of less than 10nm precipitation phase in steel A and B is 2. 2% and 21. 7%.     

同位素X荧光谱线解析法获取单一稀土元素含量的研究

利用同位素X荧光谱线解析法分析萃取过程单一稀土元素的含量。使用放射源(241)Am激发稀土元素的K系荧光.用高分辨半导体探测器直接测定槽体的全部稀土元素谱线,通过多道脉冲分析器获取X荧光能谱。由于各稀土元素有其特征荧光能量,通过能量峰位值鉴别元素的种类,经过对谱线的解析处理最终求出峰的净面积,从而给出相对含量(利用自行设计分析软件IXRF)。通过微机解谱、处理数据.由所分析结果得到:小于58/l浓度时分析误差小于20%;大于10g/l分析误差小于10%。本工作是为稀土萃取过程在线分析所完成的实验室阶段任务,从分析结果看可以满足在线分析的技术要求。     

现代X射线荧光分析艺术

现代波长色散X射线光谱仪是对元素分析的一种无破坏性的、对环境无污染的分析方法.可对固体、粒末、液态样品中铍至铀间各元素进行定性、半定量及定量测定.