MANUFACTURING METHOD OF ANISOTROPIC MAGNETIC POWDER AND ANISOTROPIC MAGNETIC POWDER

Title:

MANUFACTURING METHOD OF ANISOTROPIC MAGNETIC POWDER AND ANISOTROPIC MAGNETIC POWDER

Document Type and Number:

Japanese Patent JP2023123560

Kind Code:

A

Abstract:

To provide: anisotropic magnetic powder which is low in oxygen concentration, small in average particle size, narrow in particle size distribution, and high in residual magnetic flux density; and a manufacturing method thereof.SOLUTION: The present invention relates to anisotropic magnetic powder comprising Sm, Fe, N and O, in which the content of O is 0.05 mass% or more and 0.65 mass% or less. Of the anisotropic magnetic powder, the average particle size is from 1.5 μm up to 7 μm, which is measured by a laser diffraction-type particle size distribution measurement device under a dry condition, the span defined by the formula, Span=(D90-D10)/D50 is 1.6 or less (where D10, D50 and D90 are particle sizes corresponding to 10%, 50% and 90% in integrated value of a volume-based particle size distribution), and the roundness is 0.75 or larger.SELECTED DRAWING: None

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Inventors:

MAEHARA HISASHI

Application Number:

JP2023095715A

Publication Date:

September 05, 2023

Filing Date:

June 09, 2023

Export Citation:

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Assignee:

NICHIA KAGAKU KOGYO KK

International Classes:

H01F1/059; B22F1/00; B22F1/052; B22F1/065

Attorney, Agent or Firm:

Patent Attorney Firm WisePlus

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