2010 Volume 51 Issue 11 Pages 2121-2124
The equilibrium between titanium ions (Ti2+, Ti3+) and metallic titanium (Ti) in NaCl-KCl equimolar molten salt was investigated using TiCl3 and Ti. Equilibrium experiments were carried out in metal container of titanium or stainless-steel at 740°C. The concentrations of titanium ions were determined by chemical methods consisting of continuous three steps. Ti2+ and Ti were quantitated by H2 evolution method. Ti3+ was quantitated with titration by Fe3+. As the result, the concentration of Ti2+ was higher than that of Ti3+. The concentration quotient, Kc=(xTi3+)2⁄(xTi2+)3, depends on the concentration of Ti2+. The value of Kc at 740°C is recommended to be 5.9 at xTi2+=0.02 and 2.6 at xTi2+=0.07 respectively.