Hexagonal system ferrite particles and their production process

Details Hexagonal system ferrite particles and their production process Hexagonal system ferrite particles and their production process

1997-03-06

1999-08-31

Koslow, Melissa

Compositions

Magnetic

Iron-oxygen compound containing

252 6239, 252 6263, C04B 3526

Patent

active

059450282

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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