US 11,984,245 B2
Amorphous alloy soft magnetic powder, dust core, magnetic element, and electronic device
Takuma Enomoto, Hachinohe (JP); Kai Kitamura, Hachinohe (JP); and Junya Abe, Hachinohe (JP)
Assigned to SEIKO EPSON CORPORATION, Tokyo (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Jan. 20, 2022, as Appl. No. 17/580,377.
Prior Publication US 2022/0230789 A1, Jul. 21, 2022
Int. Cl. H01F 1/147 (2006.01); H01F 1/153 (2006.01)
CPC H01F 1/14766 (2013.01) [H01F 1/1535 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An amorphous alloy soft magnetic powder, comprising:
a composition represented by the following formula:
(FexCo(1−x))(100−(a+b))(SiyB(1−y))aMb
[where M is at least one selected from the group consisting of C, S, P, Sn, Mo, Cu, and Nb,
0.73≤x≤0.85,
0.02≤y≤0.10,
13.0≤a≤19.0, and
0≤b≤2.0], wherein
a coercive force of the amorphous alloy soft magnetic powder is 24 [A/m] or more (0.3 [Oe] or more) and 199 [A/m] or less (2.5 [Oe] or less), and
a saturation magnetic flux density of the amorphous alloy soft magnetic powder is 1.60 [T] or more and 2.20 [T] or less.