Deoxidation of Neodymium by Halide Flux Treatment

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  • Sano Hiroyuki
    Department of Materials Science and Engineering, Graduate School of Engineering, Nagoya University
  • Tashiro Masami
    Department of Materials Science and Engineering, Graduate School of Engineering, Nagoya University
  • Fujisawa Toshiharu
    Department of Materials Science and Engineering, Graduate School of Engineering, Nagoya University
  • Yamauchi Chikabumi
    Department of Materials Science and Engineering, Graduate School of Engineering, Nagoya University

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Rare-earth metals usually contain large amounts of oxygen because of their reactiveness, and therefore oxygen removal is one of the major problems in the purification of rare-earth metals. In the present work, a halide flux treatment at high temperatures under an inert gas atmosphere was applied for the deoxidation of neodymium. NdF3 was used as a halide flux. The deoxidation reaction and its mechanism were discussed based on the experimental results. It was clarified that the halide flux treatment is very effective for the deoxidation of rare earth metals.

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