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

Abstract:

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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.

Info:

Periodical:

Edited by:

Yiwang Bao, Danyu Jiang, Li Tian and Jianghong Gong

Pages:

424-428

DOI:

10.4028/www.scientific.net/KEM.492.424

Citation:

Y. Q. Wei et al., "Effects of Internal Standards and Peak Profile Functions on Quantitative XRD Phase Analysis of Cement and its Hydrates", Key Engineering Materials, Vol. 492, pp. 424-428, 2012

Online since:

September 2011

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Price:

$35.00

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