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Chen-teng Sun, Qian Xu, Yan-ping Xiao, and Yong-xiang Yang, Electrochemical deposition of Nd and Nd–Fe alloy from Cu6Nd alloy in a NaCl–KCl–NdCl3 melt, Int. J. Miner. Metall. Mater., 27(2020), No. 12, pp. 1650-1656. https://doi.org/10.1007/s12613-020-2130-0
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Electrorefining effectively separates metals from their corresponding alloys. To obtain Nd from Cu6Nd alloy, cyclic voltammetry and square wave voltammetry were used to investigate the reduction behavior of Nd3+ and the anode dissolution behavior of Cu6Nd in the NaCl–KCl–0.5mol%NdCl3 melt at 1023 K. According to the analysis of the electrochemical behavior, the cell voltage was determined to be between 0.3 and 1.2 V for separating Nd from Cu6Nd. After electrolysis at 0.6 V for 4 h, the Nd was found at the surface of the Mo cathode without any Cu. For the Fe cathode, a deposition with an atom ratio of Nd : Fe = 1:1 was formed on the surface. However, the low current density of separation remains a great experimental challenge that must be solved.
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