US 12,406,789 B2
Magnetic material and rotating electric machine
Naoyuki Sanada, Yokohama Kanagawa (JP); Tomohiro Suetsuna, Kawasaki Kanagawa (JP); and Hiroaki Kinouchi, Tokyo (JP)
Assigned to Kabushiki Kaisha Toshiba, Tokyo (JP)
Filed by KABUSHIKI KAISHA TOSHIBA, Tokyo (JP)
Filed on Mar. 3, 2020, as Appl. No. 16/807,400.
Claims priority of application No. 2019-169520 (JP), filed on Sep. 18, 2019.
Prior Publication US 2021/0082608 A1, Mar. 18, 2021
Int. Cl. H01F 3/08 (2006.01); B22F 1/068 (2022.01); B22F 1/16 (2022.01); B22F 3/02 (2006.01); H01F 1/147 (2006.01); B22F 1/08 (2022.01); B22F 1/10 (2022.01)
CPC H01F 3/08 (2013.01) [B22F 1/068 (2022.01); B22F 1/16 (2022.01); B22F 3/02 (2013.01); H01F 1/14741 (2013.01); B22F 1/08 (2022.01); B22F 1/10 (2022.01); B22F 2301/15 (2013.01); B22F 2301/35 (2013.01); B22F 2304/05 (2013.01); B22F 2304/10 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A magnetic material, comprising:
a plurality of flaky magnetic metal particles, each flaky magnetic metal particle having a flat surface, and a magnetic metal phase containing at least one first element selected from the group consisting of Fe, Co, and Ni, the flaky magnetic metal particles having an average thickness of from 10 nm to 100 μm and an average value of the ratio of the average length in the flat surface to the thickness of from 5 to 10,000;
an intercalated phase existing between the flaky magnetic metal particles and containing at least one second element selected from the group consisting of oxygen (O), carbon (C), nitrogen (N), and fluorine (F); and
a plane,
wherein the magnetic material includes the intercalated phase at a volume ratio of from 4% to 17% and includes voids at a volume ratio of 30% or less, and an average angle of orientation between the flat surface and the plane of the magnetic material is 10° or less.