Method for producing magnetic particles, magnetic particles, and permanent magnet using same

Abstract

A method for producing magnetic particles containing a manganese-aluminum alloy, the method including: mixing manganese particles, an aluminum source, an activator containing a halide, and an anti-sintering agent to obtain a mixed powder, in which the manganese particles have a maximum particle diameter of 50 μm or less, and the anti-sintering agent has a maximum particle diameter of 0.0002 times or more and 3 times or less the maximum particle diameter of the manganese particles; heating the mixed powder to a temperature in a range of 1,000° C. to 1,235° C. to perform a calorizing treatment on the manganese particles to obtain a treated mixture that comprises particles containing a manganese-aluminum alloy, in which the manganese-aluminum alloy has a ratio (Al/Mn) of aluminum to manganese in a range of 25/75 to 35/65 in mass ratio; and collecting the particles containing a manganese-aluminum alloy from the treated mixture.

Dependencies are inferred from the claim text.