Title:
MAGNETIC MATERIAL AND INDUCTOR
Document Type and Number:
WIPO Patent Application WO/2021/199480
Kind Code:
A1
Abstract:
A magnetic material 1 is constituted by an aggregate of a plurality of magnetic particles 10. Upon rotating by 360/n degrees (where n is an integer of 2 or more) around a first center of gravity position G10X of a first magnetic particle 10X within a first planar region P1, the surface area of the first magnetic particle 10X after rotation overlaps with at least 90% of the surface area of the first magnetic particle 10X before rotation.
The center of gravity positions of at least 9 and no more than 11 of the magnetic particles 10 are present on a rectangular first band portion B1 in the first planar region P1.
With regard to the magnetic particles 10 which are present in the first planar region P1, where the 50% cumulative frequency distribution D50 based on the number of magnetic particles at the maximum length in a first direction d1 that passes through the centers of gravity of the magnetic particles in the first planar region P1 is α, the 10% cumulative frequency distribution D10 is 0.9α or more, and the 90% cumulative frequency distribution D90 is 1.1α or less.
The surface of each magnetic particle 10 is coated with an insulative film 20.
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Inventors:
MIYAKE ISAMU (JP)
SUGIYAMA MIKITO (JP)
ODAHARA MITSURU (JP)
SUGIYAMA MIKITO (JP)
ODAHARA MITSURU (JP)
Application Number:
PCT/JP2020/042100
Publication Date:
October 07, 2021
Filing Date:
November 11, 2020
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H01F1/24; H01F17/04
Domestic Patent References:
| WO2007111122A1 | 2007-10-04 |
Foreign References:
| JP2001519047A | 2001-10-16 | |||
| JPH04188705A | 1992-07-07 |
Attorney, Agent or Firm:
YASUTOMI & ASSOCIATES (JP)
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