PROCESS FOR PRODUCING FERROMAGNETIC IRON NITRIDE PARTICLES, ANISOTROPIC MAGNET, BONDED MAGNET AND COMPACTED MAGNET
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United States of America Patent
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N/A
Issued Date -
Oct 2, 2014
app pub date -
Sep 20, 2012
filing date -
Sep 22, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention provides ferromagnetic iron nitride particles, in particular, in the form of fine particles, and a process for producing the ferromagnetic iron nitride particles. The present invention relates to a process for producing ferromagnetic iron nitride particles, comprising the steps of mixing metallic iron obtained by mixing at least one compound selected from the group consisting of a metal hydride, a metal halide and a metal borohydride with an iron compound, and then subjecting the obtained mixture to heat treatment, with a nitrogen-containing compound; and then subjecting the resulting mixture to heat treatment, in which a reduction step and a nitridation step of the iron compound are conducted in the same step, and the at least one compound selected from the group consisting of a metal hydride, a metal halide and a metal borohydride is used as a reducing agent in the reduction step, whereas the nitrogen-containing compound is used as a nitrogen source in the nitridation step.
First Claim
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Family
| Country | kind | publication No. | Filing Date |
|---|---|---|---|
| JP | B2 | JP5924657 | Sep 22, 2011 |
| KR | A | KR20140078625 | Sep 20, 2012 |
| WO | A1 | WO2013042721 | Sep 20, 2012 |
| EP | A1 | EP2760033 | Sep 20, 2012 |
| CN | A | CN103814417 | Sep 20, 2012 |
| TW | A | TW201327589 | Sep 21, 2012 |
| JP | B2 | JP6155440 | Sep 21, 2012 |
International Classification(s)
- 2012 Application Filing Year
- B22F Class
- 463 Applications Filed
- 400 Patents Issued To-Date
- 86.40 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 7 Citation Count
- B22F Class
- 10.53 % this patent is cited more than
- 11 Age