Sodium Activity in Molten Aluminum Measured with a Solid Electrolyte

Abstract

Abstract: The sodium activities in aluminium in equilibrium with cryolite-alumina melt and during electrolysis were determined by EMF with Naβ-Al_2O_3 solid electrolyte.With this sodium activities,we calculate the activities of NaF and AIF_3 in the cryolite-alumina melt.The potential difference of discharge be- tween sodium ions and aluminum ions at cathode of Hall-Heroult cell was also obtained from the sodium activity in aluminum.

Key words: activity, solid electrolyte, cryolite-alumina melt

Gang XIE Shanghai Institute of Metallurgy,Academia Sinica,Shanghai,200050,ChinaShiyin SHEN Northeast University of Technology,Shenyang,110006,China. Sodium Activity in Molten Aluminum Measured with a Solid Electrolyte[J]. J Mater Sci Technol, 1993, 9(5): 388-390.

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Sodium Activity in Molten Aluminum Measured with a Solid Electrolyte

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