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Title:
RARE EARTH/IRON FLUORIDE AND METHOD FOR PRODUCING AND USING THE SAME
Document Type and Number:
Japanese Patent JP2557757
Kind Code:
B2
Abstract:

PURPOSE: To produce a rare earth/iron fluoride compound useful as a reactant in a thermite reduction process.
CONSTITUTION: The particulate mixture of Fe2O3 and RE2O3 (RE is rare earth elements) is reacted with HF acid in an amount exceeding a stoichiometric amount, and in this case, the HF acid generates an insoluble fluoride compound comprising REF3 and FeF3 present in a solid solution state in the crystal, lattice of REF3. The fluoride compound is dried and a single reagent useful for the thermite reduction process or the like which requires an REF3/FeF3 mixture is obtained. The fluoride compound containing REF3 (RE is the rare earth element) and 5-40 wt.% of FeF3 present in the solid solution state in the crystal lattice of REF3 and thermite reduction reaction using it are presented. It is useful for the manufacture of a rare earth/iron magnet.


Inventors:
FUREDERITSUKU EI SHUMITSUTO
JON TEII HOIIROTSUKU
DEIBITSUDO TEII PIITAASON
Application Number:
JP1991000199816
Publication Date:
November 27, 1996
Filing Date:
July 16, 1991
Export Citation:
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Assignee:
UNIV IOWA STATE RES FOUND INC (US)
International Classes:
C01G49/10; B22F9/20; C01F17/00; C01G49/00; C22B5/04; (IPC1-7): C01G49/10; B22F9/20
Domestic Patent References:
JP6442302A
JP60195001A
JP5939720A
Attorney, Agent or Firm:
倉内 基弘 (外1名)