No CrossRef data available.
Article contents
A Technique for Studying Coprecipitated Chromia-Alumina Catalysts by X-Ray Diffraction
Published online by Cambridge University Press: 06 March 2019
Abstract
A diffractometer equipped with a gas proportional counter and pulse-height analyzer provides a very satisfactory means of recording the X-ray diffraction patterns of chromium-containing materials with Cu K α radiation. The fluorescent chromium K radiation can be rejected along with much of the white background radiation without appreciable loss of Cu K α intensity, and the advantages of copper over chromium or molybdenum radiation can be fully utilized. This is illustrated by an X-ray diffraction study of coprecipitated chromia-alumina catalysts, in which the chromium concentration varies between 0 and 37 w, %. At each chromium concentration the precipitate was studied in the washed and dried state, as well as after calcination at 500, 750, and 1400°C. X-ray diffraction patterns are presented to show the phase transformations and sample inhomogenelties that were observed.
Information
- Type
- Research Article
- Information
- Copyright
- Copyright © International Centre for Diffraction Data 1960
References
1.
Compton, A. H. and Allison, S. K., X-rays in Theory and Experiment, 2nd Edition, D. Van No strand Co., Princeton, New Jersey, 1935, p. 521.Google Scholar
2.
Davis, R. J., Griffith, R. H., and Marsh, J. D. F., “The Physical Properties of Chromia-Alumlna Catalyst,” Advances in Catalysis, Vol, 9, Academic Press, New York, 1957, p. 155.Google Scholar
3.
Parrish, W. and Kohler, T. R., “Use of Counter Tubes in X-ray Analysts,” Rev. Sci, Instr., Vol. 27, 1956, p. 795.Google Scholar
4.
Dowling, P. H., Hendee, C. F., Kohler, T. R., and Parrish, W., “Counters for X-ray Analysis,” Philips Tech, Rev., Vol. 18. 1956, p. 262.Google Scholar