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Residual hydroxyl groups in the metakaolin range1

Published online by Cambridge University Press:  14 March 2018

V. Stubičan*
Affiliation:
Institute for Silicate Chemistry, Zagreb, Yugoslavia

Summary

Infra-red absorption spectroscopy has been used to study the retention of hydroxyl groups by kaolinite and halloysite after heat treatment in the range 600° C. to 850° C. Structurally disordered specimens initially lose water more rapidly than do ordered specimens, but retain hydroxyl groups at higher temperatures. Work on the phases obtained above 1100° C. is incomplete, but results for the lower temperatures indicate that the ordered structures tend to retain their atomic arrangement and form metakaolin, whereas disordered structures readily rearrange to yield γ-alumina, to the formation of which water is probably essential.

Type
Research Article
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1959

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Footnotes

1

Extracted from a thesis submitted to the University of Zagreb for a title of Assistant Professor.

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