Method of producing bonded magnet comprising SmFeN-based anisotropic magnetic powder
AssigneeNichia Corporation
InventorHisashi Maehara
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Abstract
A method of producing a SmFeN-based anisotropic magnetic powder is provided, the method including preparing a SmFeN-based anisotropic magnetic powder before dispersing comprising Sm, Fe, W, and N, and dispersing the SmFeN-based anisotropic magnetic powder before dispersing using a resin-coated metal media or a resin-coated ceramic media to obtain a SmFeN-based anisotropic magnetic powder. Also provided is a SmFeN-based anisotropic magnetic powder comprising Sm, Fe, W, and N and having an average particle size of less than 2.5 μm, a residual magnetization σr of not less than 130 emu/g, and an oxygen content of not higher than 0.75% by mass.
Claims18
A method of producing a bonded magnet, the method comprising:
- preparing a SmFeN-based anisotropic magnetic powder before dispersing comprising Sm, Fe, W, and N, and
- dispersing the SmFeN-based anisotropic magnetic powder using a resin-coated metal media or a resin-coated ceramic media to obtain a SmFeN-based anisotropic magnetic powder, and
- mixing the SmFeN-based anisotropic magnet powder and a resin,
- wherein the media has a diameter of at least 2 mm and not more than 100 mm.
A method of producing a bonded magnet, the method comprising:
- preparing a SmFeN-based anisotropic magnetic powder before dispersing comprising Sm, Fe, W, and N, and
- dispersing the SmFeN-based anisotropic magnetic powder using a resin-coated metal media or a resin-coated ceramic media to obtain a SmFeN-based anisotropic magnetic powder, and
- mixing the SmFeN-based anisotropic magnet powder and a resin,
- wherein the dispersing is performed by a vibration mill, and
- wherein, in the dispersing, an amount of the media is at least 60% by volume but not more than 70% by volume, and an amount of the SmFeN-based anisotropic magnetic powder before dispersing is at least 3% by volume but not more than 20% by volume, each relative to a volume of a container used to contain the SmFeN-based anisotropic magnetic powder and the media.
Dependencies are inferred from the claim text.