Indirect Methods of Determination of K:Al Mole Ratio in Molten Chloroaluminates

Indirect methods for determining K : Al mole ratio in molten chloroaluminates were proposed to obtain correct data and perform possible required adjustment of the acid-base properties of KCl-AlCl 3 electrolytes. Potentiometric calibration curves for different compositions of chloroaluminate melts were obtained at temperatures ranging from 350 to 450 o C. It is shown that cyclic voltammograms measured in melts with different K : Al mole ratios also can be used for estimating acidity/basicity of KCl-AlCl 3 melts. Full profile Rietveld analysis of X-ray diffraction patterns was suggested for characterization of quenched chloroaluminate electrolytes.