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Title: Electrochemical Formation of Pr-Ni Alloys in LiF-CaF2-PrF3 and NaCl-KCl-PrCl3 Melts
Authors: Yasuda, K.
Kondo, K.
Nohira, T.
Hagiwara, R.
Author's alias: 安田, 幸司
Issue Date: 15-Feb-2014
Publisher: Electrochemical Society
Journal title: Journal of the Electrochemical Society
Volume: 161
Issue: 7
Start page: D3097
End page: D3104
Abstract: For the establishment of a process for the electrochemical recovery of rare earth elements from used magnet scraps, the electrochemical formation of Pr–Ni alloys in molten LiF–CaF2–PrF3 and NaCl–KCl–PrCl3 salts at 1123 K and 973 K, respectively, was investigated. Cyclic voltammetry and open-circuit potentiometry indicated the formation of several phases of Pr–Ni alloys. Alloy samples were prepared by one- or two-step potentiostatic electrolysis using a Ni plate electrode at various potentials. Scanning electron microscopy observations and X-ray diffraction measurements confirmed the formation of PrNi2, PrNi3, Pr2Ni7, and PrNi5. The formation potential for each Pr–Ni alloy phase was determined from experimental results. In addition, the optimum electrolysis conditions for the separation of Nd, Dy, and Pr are discussed.
Rights: © 2014 The Electrochemical Society
DOI(Published Version): 10.1149/2.012407jes
Appears in Collections:Journal Articles

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