Abstract

PIENAAR, A.D.  and  VILAKAZI, B.M.. Gas-phase fluorination kinetics of Ta₂O₅ with elemental fluorine. J. S. Afr. Inst. Min. Metall. [online]. 2012, vol.112, n.spe, 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.

Keywords : Fluorination; tantalum; Ta₂O₅; thermogravimetry; reaction mechanism..

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