Abstract
The incomplete transformation of gibbsite Al(OH) 3 into boehmite AlO(OH) during the course of its thermal decomposition is explained with the help of a model involving both a diffusion of hydroxyls either along the “structural channels” of the gibbsite microcrystal or along the cleavage planes and a desorption of water. This study is based mainly on experiments carried out with micron-size samples, involving thermal analysis under controlled pressure and constant decomposition rate.
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