Degradation of aluminum nitride powder in an aqueous environment

80% of the AlN was consumed in 24 h. The initial reaction product was a porous, amorphous, hydrated Al sub 2 O sub 3 with stoichiometry near AlOOH. After approximately 16 h a crystalline phase, bayerite Al(OH) sub 3 , formed which became the predominant phase after 24-h contact. Kinetics of the AlN...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 1990-03, Vol.73 (3), p.724-728
Main Authors: BOWEN, P, HIGHFIELD, J. G, MOCELLIN, A, RING, T. A
Format: Article
Language:English
Subjects:
Chemistry
Exact sciences and technology
Inorganic chemistry and origins of life
Kinetics and mechanism of reactions
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Summary:80% of the AlN was consumed in 24 h. The initial reaction product was a porous, amorphous, hydrated Al sub 2 O sub 3 with stoichiometry near AlOOH. After approximately 16 h a crystalline phase, bayerite Al(OH) sub 3 , formed which became the predominant phase after 24-h contact. Kinetics of the AlN consumption were first order and the reaction rate linear. Kinetic data fit an unreacted core model with a porous product layer where the surface chemical reaction controlled overall kinetics. 36 refs.
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1151-2916.1990.tb06579.x