METHOD FOR PRODUCING ANISOTROPIC MAGNETIC POWDER, AND ANISOTROPIC MAGNETIC POWDER
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United States of America Patent
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Issued Date -
Jul 27, 2023
app pub date -
Jun 16, 2021
filing date -
Jun 19, 2020
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Abstract
Provided is an anisotropic magnetic powder having a low oxygen concentration, a small average particle size, a narrow particle size distribution, and a high remanence, and a method for producing the anisotropic magnetic powder. The present disclosure relates to a method for producing an anisotropic magnetic powder, including: pretreating an oxide containing Sm and Fe by heat-treating the oxide in a reducing gas atmosphere to obtain a partial oxide; heat-treating the partial oxide in the presence of a reducing agent to obtain alloy particles; nitriding the alloy particles to obtain a nitride; and treating the nitride with an alkali to obtain a magnetic powder.
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