Electrofused Alumomagnesium Spinel

Electrofused Alumomagnesium Spinel The effect of the MgO/Al2O3 ratio in an electrofused material obtained with the use of technical alumina and caustic magnesite is investigated. A conventionally thermostable material with minimum range of shrinkage or growth is obtained for the MgO/Al2O3 ratio ranging from 0.38 to 0.48. The alumomagnesium material grows due to the decomposition of the solid solution, the formation of crystals of Al2O3 spinel on the surface, and the interaction between the latter and periclase. The distribution of the elements over the volume of spinel grains studied by x-ray spectral microanalysis confirms the suggested mechanism of growth of the spinel-bearing material upon heating. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Refractories and Industrial Ceramics Springer Journals

Electrofused Alumomagnesium Spinel

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Publisher
Springer Journals
Copyright
Copyright © 2000 by Plenum Publishing Corporation
Subject
Materials Science; Characterization and Evaluation of Materials; Materials Science, general; Ceramics, Glass, Composites, Natural Materials
ISSN
1083-4877
eISSN
1573-9139
D.O.I.
10.1023/A:1011356317304
Publisher site
See Article on Publisher Site

Abstract

The effect of the MgO/Al2O3 ratio in an electrofused material obtained with the use of technical alumina and caustic magnesite is investigated. A conventionally thermostable material with minimum range of shrinkage or growth is obtained for the MgO/Al2O3 ratio ranging from 0.38 to 0.48. The alumomagnesium material grows due to the decomposition of the solid solution, the formation of crystals of Al2O3 spinel on the surface, and the interaction between the latter and periclase. The distribution of the elements over the volume of spinel grains studied by x-ray spectral microanalysis confirms the suggested mechanism of growth of the spinel-bearing material upon heating.

Journal

Refractories and Industrial CeramicsSpringer Journals

Published: Oct 7, 2004

References

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