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Purification of Yttrium by Electrorefining.
Fleck-DC; Kleespies-EK; Kesterke-DG
NTIS: PB 214 763 :12 pages
Electrorefining yttrium from selected low-melting yttrium-base alloys is investigated, and various halide systems are studied as potential electrolytes for use in preparing low-oxygen yttrium by electrorefining unalloyed yttrium. Yttrium cathode products having significantly less metallic impurities than the anode materials were prepared from alloys containing nickel, iron, and manganese by electrorefining in licl-ycl3 electrolytes at 900 deg to 1,000 deg c. Yttrium-copper and yttrium-magnesium alloys are not suitable as anode feed materials. An evaluation of chloride, fluoride, bromide, and mixed chloride-fluoride electrolytes showed that cathode products containing much less oxygen than the anode material can be obtained in the fluoride and mixed chloride-fluoride systems. Initial cathode current density has no apparent effect on the purity of the products obtained in both phases of the investigation.
IH; Report of Investigation;
NTIS Accession No.
NTIS: PB 214 763
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division