Mechanism and Kinetics of the Anodic Reaction in Cryolite Melts : I. The Influence of CaF2 (5 wt%) at Different Al2O3 Content

• Autorzy: Kisza A. , Thonstad J. , Hives J.
• Języki publikacji: EN

Abstrakty

EN

Calcium fluoride is one of the two main components of the cryolite-based electrolyte in aluminium electrolysis. By Electrochamical Impedance Spectroscopy (EIS) the influence of CaF2 upon the kinetics and mechanism of the anodic reaction in 4 cryolite-alumina melts containing 2,4,6 and 8 wt% of alumina. The diddusion coefficient of the Al2OF2- anionic species decreases as a function of the alumina content, due to the increase of the melts viscosity.

Słowa kluczowe

EN

aluminium electrolysis; electrode kinetics; cryolite melts; alumina; electrochemical impedance spectroscopy

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2000
• Tom: Vol. 74, nr 4
• Strony: 549--558

Twórcy

autor

Kisza A.

autor

Thonstad J.

autor

Hives J.

• Faculty of Chemistry University of Wrocław, Poland