Process for the production of anisotropic ferrite magnets

Details Process for the production of anisotropic ferrite magnets Process for the production of anisotropic ferrite magnets

1993-06-08

1997-07-15

Fiorilla, Christopher A.

Plastic and nonmetallic article shaping or treating: processes

Direct application of electrical or wave energy to work

Producing or treating magnetic product precursor thereof

264427, 264611, B28B 300

Patent

active

056480393

ABSTRACT:
A slurry containing ferrite magnet raw material particles and a non-aqueous solvent is compacted wet in a magnetic field, while said non-aqueous solvent is removed therefrom, to obtain a compact, and the compact is sintered to obtain an anisotropic ferrite magnet. In this case, a surface active agent is allowed to exist in the slurry during the wet compaction. Alternatively, in addition to or in place of this, the raw material particles are pulverized to apply strains thereto, thereby reducing the iHc values to preferably 3.5 kOe or less. This makes some considerable improvement in the degree of orientation of the compact, thus achieving much more improved magnet properties.

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