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首页> 外文会议>Zeitschrift fur Kristallographie Supplement Issue no.23 2006: International Journal for Structural, Physical, and Chemical Aspects of Crystalline Materials >Quantitative phase analysis of ordinary Portland cements using synchrotron radiation powder diffraction
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Quantitative phase analysis of ordinary Portland cements using synchrotron radiation powder diffraction

机译：同步辐射粉末衍射法对普通硅酸盐水泥的定量相分析

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摘要

High-resolution synchrotron X-ray powder diffraction data have been analysed using the Rietveld methodology to obtain the mineralogical composition of four commercial and NIST RM-8488 Portland clinkers. Alite phase coexistence has been observed in four patterns. White Portland clinkers show a single alite or a very small amount of a second alite phase with smaller unit cell volume likely due to a higher magnesium content. Grey Portland clinkers show a much more pronounced alite phase coexistence. This effect is not so pronounced or even negligible when low resolution data, i.e. laboratory X-ray powder diffraction data are used. Moreover, the full mineralogical composition (including the non-diffracting content) has been determined from the overestimation of the added standard, α-Al_2O_3, in the Rietveld analyses. White clinkers contain ～15 wt% of non-diffracting content while this fraction is much smaller in grey clinkers, ～7 wt%.
机译：使用Rietveld方法分析了高分辨率同步加速器X射线粉末衍射数据，以获得四种商用NIST RM-8488波特兰熟料的矿物学组成。已观察到四种模式的阿利特相共存。白色波特兰熟料显示出单一的alite或非常少量的第二alite相，由于较高的镁含量，其晶胞体积较小。灰色波特兰熟料显示出更为明显的阿立特相共存。当使用低分辨率数据（即实验室X射线粉末衍射数据）时，这种效果不是很明显，甚至可以忽略不计。此外，在Rietveld分析中，根据对添加标准α-Al_2O_3的高估，确定了完整的矿物组成（包括非衍射含量）。白色熟料的非衍射含量约为15 wt％，而灰色熟料的这一含量要小得多，约为7 wt％。

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