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Journal of the Southern African Institute of Mining and Metallurgy

versão On-line ISSN 2411-9717
versão impressa ISSN 0038-223X


PIENAAR, A.D.  e  VILAKAZI, B.M.. Gas-phase fluorination kinetics of Ta2O5 with elemental fluorine. J. S. Afr. Inst. Min. Metall. [online]. 2012, vol.112, pp.545-549. ISSN 2411-9717.

The aqueous chemistry of niobium and tantalum compounds with hydrofluoric acid is a mature field of investigation. In contrast, very little attention has been paid to reactions of these compounds in non-aqueous environments. Similarly, reactions of elemental fluorine with niobium and tantalum compounds have received little more than cursory attention in literature. This work discusses the isothermal reaction kinetics derived from thermogravimetry, using a less redundant approach than is currently the standard. We also discuss the most likely kinetic models for this reaction.

Palavras-chave : Fluorination; tantalum; Ta2O5; thermogravimetry; reaction mechanism..

        · texto em Inglês


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