Electrochemical formation of Dy-Fe and Nd-fe alloys in molten CaCl2-LiCl systems

H. Konishi, H. Hua, H. Ono, Y. Koizumi, T. Oishi, T. Nohira

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

11 Scopus citations

Abstract

Here we study the recovery process of rare earth metals from Nd magnet scraps via electrolysis in a molten salt and with an alloy diaphragm. In the present study, the electrochemical formation of Dy-Fe and Nd-Fe alloys, which was an important step of the recovery process, was investigated in molten CaCl2-LiCl systems at 873 K. Two Dy-Fe alloy samples were prepared by potentiostatic electrolysis of Fe plate electrodes at 0.30 V (vs. Li+/Li) and 0.50 V for 1 h in CaCl2-LiCl-DyCb (0.50 mol% added). The formation of DyFes was suggested by X-ray diffraction (XRD). Potentiostatic electrolysis was also conducted at 0.30 V and 0.50 V for 1 h using Fe plate electrodes in CaCl2-LiCl-NdCb (0.50 mol% added). XRD analysis suggested the formation of NdiFew for both samples. The equilibrium potentials for (DyFes+Fe) and (Nd2Fei7+Fe) coexisting phases were indicated.

Original languageEnglish
Title of host publicationECS Transactions
EditorsW. Matthew Reichert, Robert A. Mantz, Paul C. Trulove, Luke M. Haverhals, Elizabeth J. Biddinger, Hugh C. De Long, Alice H. Suroviec, Minoru Mizuhata, Mikito Ueda, Adriana Ispas, Andreas Bund, David P. Durkin
PublisherElectrochemical Society Inc.
Pages321-328
Number of pages8
Edition14
ISBN (Electronic)9781607688617
ISBN (Print)9781510871748
DOIs
StatePublished - 2018
EventSymposium on Molten Salts and Ionic Liquids 21 - AiMES 2018, ECS and SMEQ Joint International Meeting - Cancun, Mexico
Duration: 2018/09/302018/10/04

Publication series

NameECS Transactions
Number14
Volume86
ISSN (Print)1938-6737
ISSN (Electronic)1938-5862

Conference

ConferenceSymposium on Molten Salts and Ionic Liquids 21 - AiMES 2018, ECS and SMEQ Joint International Meeting
Country/TerritoryMexico
CityCancun
Period2018/09/302018/10/04

ASJC Scopus subject areas

  • General Engineering

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