Abstract

Thermal dehydroxylation of Bayer's alumina has been studied by DTA, thermogravimetry, microscopy and X-ray. Giving due consideration to the mechanisms suggested by previous workers and based on the experimental observations made in this study, it is suggested that aluminium tri-hydrate (gibbsite) breaks up in the first instance to mono and dihydrates which subsequently transform to α-alumina through a series of intermediate phases.

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