Method for producing particles for the production of permanent magnets
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United States of America Patent
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Feb 5, 1991
Grant Date -
N/A
app pub date -
Mar 22, 1988
filing date -
Mar 22, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Particles for the production of permanent magents are obtained by producing an article having Ca and a rare earth oxide including at least Nd oxide. The article is heated to effect Ca rare earth oxide reduction. Thereafter, particles of -60 mesh or finer are formed from this article. Leaching of Ca from the particles is achieved by contacting the particles with an organic acid having at least 3 carbon atoms, preferably propionic or butanoic acid.
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