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The cathodic concentration overvoltage in Na 3 AlF 6 –AlF 3 –Al 2 O 3 (sat.) melts was investigated at the temperature of 1000°C. The melts contained 10 and 20 wt.% of AlF 3 . Experimental data on the cathodic overvoltage agreed well with values calculated from the content of sodium in aluminium. The dependence of the cathodic overvoltage on temperature...
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