Effects of Internal Standards and Peak Profile Functions on Quantitative XRD Phase Analysis of Cement and its Hydrates

Yong Qi Wei; Wu Yao; Wei Wang

doi:10.4028/www.scientific.net/KEM.492.424

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 492Effects of Internal Standards and Peak Profile...

Effects of Internal Standards and Peak Profile Functions on Quantitative XRD Phase Analysis of Cement and its Hydrates

Abstract:

Quantitative X-Ray diffraction (QXRD) combined with the Rietveld refinement method allows direct determination of crystalline phase content of cement and its hydrates. However, relatively precise results need the correction of proper internal standards and the use of matched peak profile functions with masterly refinement strategies. The aim of this paper is to research and discuss effects of these factors on the quantitative phase analysis results. For this purpose, different internal standards and peak profile functions with corresponding refinement strategies were attempted in experiments and refinements. The results indicate that Al₂O₃ as internal standard is more suitable for cement and its hydrates than ZnO, and the better peak profile function is CW function 2 rather than function 3 in GSAS.

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Periodical:

Key Engineering Materials (Volume 492)

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424-428

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.492.424

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Online since:

September 2011

Authors:

Yong Qi Wei, Wu Yao, Wei Wang

Keywords:

Cement, Quantitative Phase Analysis QPA, Quantitative XRD, Rietveld Method

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