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The dehydroxylation of aluminium hydroxides and the kinetics ofα-Al2O3 formation

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Abstract

Studies were made of the dehydroxylation of several aluminium hydroxide modifications and the kinetics ofα-Al2O3 formation. The investigated samples differed in both mineral composition and the level of alkali admixtures. It was found that the rate of formation and the quantity ofα-Al2O3 depend mainly on the purity of the aluminium hydroxides, while the transition forms of alumina depend on the initial type of the aluminium hydroxide.

Zusammenfassung

Es wurde die Dehydroxylierung verschiedener Aluminiumhydroxidmodifizierungen sowie die kinetische Untersuchung der Bildung vonα-Al2O3 durchgeführt. Die untersuchten Proben unterschieden sich sowohl in ihrer Mineralienzusammensetzung als auch im Grad der Verschmutzung mit Alkalien. Man stellte fest, daß sowohl Geschwindigkeit als auch Menge vonα-Al2O3 hauptsächlich von der Reinheit des Aluminiumhydroxides abhängen und daß die Übergangsformen von Aluminiumoxid von ihrem ursprünglichen Typ von Aluminiumhydroxid abhängen.

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Pyzalski, M., Wojcik, M. The dehydroxylation of aluminium hydroxides and the kinetics ofα-Al2O3 formation. Journal of Thermal Analysis 36, 2147–2151 (1990). https://doi.org/10.1007/BF01914141

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  • DOI: https://doi.org/10.1007/BF01914141

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