THE EQUILIBRIUM BETWEEN TI2+ AND TI3+ IN THE SYSTEM TI LICL-KCL EUTECTIC MELT/

Chemical analysis was performed to study the equilibrium of Ti2+ and T i3+ in the LiCl-KCL eutectic melt. It was confirmed that the Ti2+ ion was formed by the following inverse-disproportionation reaction Ti + 2 Ti(3+) --> 3Ti(2+) from Ti3+ and titanium metal added. On the other ha nd, the Ti2+ ion produced by the constant potential electro-reduction from Ti3+ was subjected to the backward reaction of (1) attaining an e quilibrium. The solubility of Ti2+ exhibits somewhat low to be 2.0 x 1 0(-1) (mol%). It was also found that the addition of alkali fluoride i n the LiCI-KCl eut. melt retarded the inverse-dispropotionation reacti on improving the stability of the Ti3+ ion.