Rare earth magnet material and manufacture method thereof

Rare earth magnet material and manufacture method thereof

  • CN 102,667,978 B
  • Filed: 09/10/2010
  • Issued: 12/14/2016
  • Est. Priority Date: 10/10/2009
  • Status: Active Grant
First Claim
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1. the method manufacturing rare earth magnet material, described method includes:

  • The preparation process of the mixture of powders of preparation following ingredients;

    Ferromagnetic powder, described ferromagnetic powder is the powder of coupernick, and described coupernick comprises as more than one rare earth unitsFirst rare-earth element R 1 of element, boron (B) and remaining be ferrum (Fe) and inevitable impurity, and first with or without modificationElement;

    WithAs the fluoride powder of the powder of fluoride,At least one in described ferromagnetic powder and fluoride powder contains neodymium (Nd);

    Heat the formed body of described mixture of powders thus obtain the heating steps of block rare earth magnet material, wherein as in instituteState the neodymium oxide fluoride of the oxygen near the particle of ferromagnetic powder or oxide and the product of described fluoride to be distributed in and not only wrapInclude surface element and include in all parts of inside;

    WithElement is spread as follows from the diffusion into the surface of described rare earth magnet material to inside by be introduced separately into by grain boundary decisionDiffusing step, described diffusion element comprises the 3rd rare-earth element R 3 as more than one rare earth elements.

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