SmFeN-BASED ANISOTROPIC MAGNETIC POWDER AND BONDED MAGNET, AND PRODUCTION METHODS THEREOF
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United States of America Patent
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Aug 15, 2024
app pub date -
Jun 2, 2022
filing date -
Jun 10, 2021
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Abstract
To provide a SmFeN-based anisotropic magnetic powder having excellent magnetic properties and a low oxygen content, and a production method thereof. A method of producing a SmFeN-based anisotropic magnetic powder includes preparing a SmFeN-based anisotropic magnetic powder before dispersion containing Sm, Fe, and N; and dispersing the SmFeN-based anisotropic magnetic powder before dispersion using resin-coated metal media or resin-coated ceramic media. The SmFeN-based anisotropic magnetic powder contains Sm, Fe, and N and has an average particle size in a range from 2.5 μm to 5 μm, a residual magnetization σr of 150 emu/g or more, and an oxygen content of 0.4 mass % or less.
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