Magnesia-stabilised zirconia solid electrolyte assisted electrochemical investigation of iron ions in a SiO-CaO-MgO-AlO molten slag at 1723 K.

Production of metallic iron through molten oxide electrolysis using inert electrodes is an alternative route for fast ironmaking without CO emissions. The fact that many inorganic oxides melt at ultrahigh temperatures (>1500 K) challenges conventional electro-analytical techniques used in aqueous, organic and molten salt electrolytes. However, in order to design a feasible and effective electrolytic process, it is necessary to best understand the electrochemical properties of iron ions in molten oxide electrolytes.