The equilibrium potential of the cell Alup 1 NatiF, + A1808c,t, 1 Pt, 0, was determined from potential-decay curves to be 2.205 V at 1000ยฐC. A Tafel plot of the anodic overvoltage. shows two straight portions with slopes RT/3F and RT/F, indicating a two-step discharge reaction of oxygen, with exchan
Critical current densities in cryolite-alumina melts
โ Scribed by J. Thonstad
- Publisher
- Elsevier Science
- Year
- 1967
- Tongue
- English
- Weight
- 567 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0013-4686
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๐ SIMILAR VOLUMES
At cds above a crrtical cd, oxygen drscbarge on carbon m cryoltte-elumma melts IS l&ted bv dBuston-controlled deuletton of dtssolved alumma. followed bv the anode effect In melts wtth 2% pond6raux Al& 1+/\\*/C d6croit lm&irement a densite de courant crorssante pour des temps de transttion comprts en
## Previous measurements of the current -voltage behaviour during anode effect in cryolite melts were extended to other NaF/AlF, ratios and to pure sodium halides. In all systems the current-voltage curves had similar shapes, showing several maxima and minima. The AE voltage range in which cryolit
When a constant cathodic current is applied to an aluminium electrode in a Na3A1F6-AlaO, melt at lOlO"C, the potential decreases gradually and linearly with the square root of time to more negative values. Pronounced potential oscillations occurred at cds above 2A/cm2 and the evolution of sodium gas