Tdk Corporation

Shota Otsuka

Hiroyuki Matsumoto

Kazuhiro Yoshidome

Kenji Horino

Seigo Tokoro

Takuma Nakano

Kentaro Mori

Satoko Mori

Toru Ujiie

Akito Hasegawa

Akihiro Harada

Hajime Amano

Kensuke Ara

A soft magnetic metal powder comprising soft magnetic metal particles including Fe, wherein a surface of the soft magnetic metal particle is covered by a coating part having an insulation property, and the coating part includes a soft magnetic metal fine particle.

Soft magnetic metal powder, dust core, and magnetic component

A soft magnetic metal powder having soft magnetic metal particles, wherein a surface of the soft magnetic metal particle is covered by a coating part, the coating part has a first coating part, a second coating part, and a third coating part in this order from the surface of the soft magnetic metal particle towards outside, the first coating part includes oxides of Si as a main component, the second coating part includes oxides of Fe as a main component, and the third coating part includes a compound of at least one element selected from the group consisting of P, Si, Bi, and Zn.

A soft magnetic metal powder having soft magnetic metal particles including Fe, wherein a surface of the soft magnetic metal particle is covered by a coating part, the coating part has a first coating part and a second coating part in this order from the surface of the soft magnetic metal particle towards outside, the first coating part includes oxides of Fe as a main component, the second coating part includes a compound of at least one element selected from the group consisting of P, Si, Bi, and Zn, and a ratio of trivalent Fe atom among Fe atoms of oxides of Fe included in the first coating part is 50% or more.

A soft magnetic alloy including a compositional formula of ((FeX1X2)MBPCu)C, wherein X1 is one or more selected from the group consisting Co and Ni, X2 is one or more selected from the group consisting of Al, Mn, Ag, Zn, Sn, As, Sb, Bi, N, O, and rare earth elements, 'M' is one or more selected from the group consisting of Nb, Hf, Zr, Ta, Ti, Mo, W, and V, 0.030&#x3c;a&#x2264;0.14, 0.028&#x2264;b&#x2264;0.20, 0&#x2264;c&#x2264;0.030, 0&#x3c;e&#x2264;0.030, 0&#x3c;f&#x2264;0.040, &#x3b1;&#x2265;0, &#x3b2;&#x2265;0, and 0&#x2264;&#x3b1;+&#x3b2;&#x2264;0.50 are satisfied.

Soft magnetic alloy and magnetic device

A soft magnetic alloy including a main component having a compositional formula of (FeX1X2)MBP, and a sub component including at least C, S and Ti, wherein X1 is one or more selected from the group including Co and Ni, X2 is one or more selected from the group including Al, Mn, Ag, Zn, Sn, As, Sb, Bi, and rare earth elements, 'M' is one or more selected from the group including Nb, Hf, Zr, Ta, Mo, W, and V, 0.020&#x2264;a&#x2264;0.14, 0.020&#x2264;b&#x2264;0.20, 0&#x2264;c&#x2264;0.040, &#x3b1;&#x2265;0, &#x3b2;&#x2265;0, and 0&#x2264;&#x3b1;+&#x3b2;&#x2264;0.50 are satisfied, when entire said soft magnetic alloy is 100 wt %, a content of said C is 0.001 to 0.050 wt %, a content of said S is 0.001 to 0.050 wt %, and a content of said Ti is 0.001 to 0.080 wt %, and when a value obtained by dividing the content of said C by the content of said S is C/S, then C/S satisfies 0.10&#x2264;C/S&#x2264;10.

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Tokyo, Japan

Shota Otsuka