Activation of Molten Alkali Chloroaluminates

Abstract

The electrical conductivity of molten sodium and potassium chloroaluminumates increase with increasing electrical field strength and reach the limiting values. The limiting high-voltage conductivities of the melts surpass their usual values up to 200% in NaAlCl4and 700% in KAlCl4. These results have been obtained on the base of analysis of the microsecond high-voltage discharges in the melts (the Wien effect). After the high-voltage pulses discharges having been completed in the melts, their conductivity has been found to rise up to 50% (the “memory effect”). The relaxation time of a non-equilibrium state reaches 5 minutes and more.

Structural Relaxation in the Activated Molten Chloride Electrolytes of Polyvalent Metals

“…The activation degree of conductivity also rises with increasing number of pulses and their voltage amplitude, and tends to the saturation. In Figure 7, as examples, these dependences are presented for a magnesium electrolyte Similar results were obtained for other compositions of molten mixtures [7][8][9][10][11][12][13][14][15]. The results obtained in Sections 3.1 and 3.3 are collected in Table 1.…”