Preparation of Magnesium-Rare Earth Master Alloy Using Electrowinning Method with Subsidence Cathode
A new series of magnesium-rare earth master alloys have been developed by the electrowinning method with subsidence cathode in the KCl•NaCl-RECl3 system. The electrolysis conditions were studied. Experimental results showed that the optimum for electrolyte at 850oC and 10~20wt% RECl3 content in the molten salt system. The current efficiency of electrolyte increased with increasing the rare earth content and reach the maximum at the content of 20% RECl3. The current efficiency gradually decreased with increasing cathode current density. The component of master-alloys was analyzed using ICP-MS and chemical method. A series of magnesium-rare earth master-alloy, Mg-Y, Mg-Nd, Mg-Ce, Mg-La, Mg-Nd-rich and Mg-LPC were successfully prepared and the content of rare earth is adjustable between 5 – 20%.
W.Ke, E.H.Han, Y.F.Han, K.Kainer and A.A.Luo
D.P. Zhang et al., "Preparation of Magnesium-Rare Earth Master Alloy Using Electrowinning Method with Subsidence Cathode", Materials Science Forum, Vols. 488-489, pp. 235-238, 2005