Magnetic powder, permanent magnet produced therefrom and process for producing them
AssigneeSeiko Epson Corporation
InventorsAtsunori Kitazawa, Toshiyuki Ishibashi, Koji Akioka
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Abstract
A magnetic powder and a permanent magnet are provided which have magnetic properties enhanced by magnetic interaction. Disclosed are a magnetic powder comprising a mixture of two or more powders including a magnetic powder A (residual magnetic flux density: BrA, coercive force: HcA) and a magnetic powder B (residual magnetic flux density: BrB, coercive force: HcB) of which the residual magnetic flux densities and the coercive forces have the following relationships: BrA>BrB and HcA<HcB, and a bonded magnet or a sintered magnet produced from the magnetic powder, and a method for mixing magnetic powders and a process for producing a magnet.
Claims28
A magnetic powder comprising a mixture of two or more powders including a magnetic powder A having a residual magnetic flux density BrA and a coercive force HcA and a magnetic powder B having a residual magnetic flux density BrB and a coercive force HcB, wherein said residual magnetic flux densities and said coercive forces have the following relationships:
- BrA>BrB and HcA<HcB and said coercive forces have the following relationship:
- HcA=y.multidot.HcB wherein 0.1<y<1.
Dependencies are inferred from the claim text.