Tdk Corporation

Seigo Tokoro

Hiroyuki Matsumoto

Kazuhiro Yoshidome

Kenji Horino

Akito Hasegawa

Takuma Nakano

Akihiro Harada

Hajime Amano

Satoko Mori

Kensuke Ara

Shota Otsuka

Kentaro Mori

Teruo Mori

Syota Goto

Yu Yonezawa

Toru Ujiie

Takeshi Takahashi

Masakazu Hosono

Masahito Koeda

Takeshi Nomura

Kenichi Nishikawa

Shiro Tomizawa

Hideaki Yokota

Seiichi Kikuchi

Naomichi Umehara

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 alloy comprising a main component having a compositional formula of ((FeX1X2)MBCr)C, and a sub component including P, S and Ti, wherein X1 is selected from the group Co and Ni, X2 is selected from the group Al, Mn, Ag, Zn, Sn, As, Sb, Bi and rare earth elements, 'M' is selected from the group Nb, Hf, Zr, Ta, Mo, W and V, 0.030&#x2264;a&#x2264;0.14, 0.005&#x2264;b&#x2264;0.20, 0&#x3c;c&#x2264;0.040, 0&#x2264;d&#x2264;0.040, &#x3b1;&#x2265;0, &#x3b2;&#x2265;0, and 0&#x2264;&#x3b1;+&#x3b2;&#x2264;0.50 are satisfied, when soft magnetic alloy is 100 wt %, P is 0.001 to 0.050 wt %, S is 0.001 to 0.050 wt %, and Ti is 0.001 to 0.080 wt %, and when a value obtained by dividing P by S is P/S, then P/S satisfies 0.10&#x2264;P/S&#x2264;10.

Soft magnetic alloy and magnetic device

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.

Provided is a soft magnetic alloy having a composition of a compositional formula (FeX1X2)))PCSiCuM. X1 is one or more selected from a group consisting of Co and Ni, X2 is one or more selected from a group consisting of Al, Mn, Ag, Zn, Sn, As, Sb, Bi, N, 0, and rare earth elements, and M is one or more selected from the group consisting of Nb, Hf, Zr, Ta, Ti, Mo, W and V. 0.050&#x2264;a&#x2264;0.17, 0&#x3c;b&#x3c;0.050, 0.030&#x3c;c&#x2264;0.10, 0&#x3c;d&#x2264;0.020, 0&#x2264;e&#x2264;0.030, &#x3b1;&#x2265;0, &#x3b2;&#x2265;0, and 0&#x2264;&#x3b1;+&#x3b2;&#x2264;0.50.

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.

Provided is a soft magnetic alloy including Fe as a main component, in which a slope of an approximate straight line, plotted between cumulative frequencies of 20 to 80% on Fe content in each grid of 80000 grids or more, each of which has 1 nm&#xd7;1 nm&#xd7;1 nm, is &#x2212;0.1 to &#x2212;0.4, provided that Fe content (atom %) of each grid is Y axis, and the cumulative frequencies (%) obtained in descending order of Fe content in each grid is X axis, and an amorphization ratio X is 85% or more.

A soft magnetic alloy contains a main component having a composition formula of (FeX1X2)MBPCand auxiliary components including at least Ti, Mn and Al. In the composition formula, X1 is one or more selected from the group consisting of Co and Ni, X2 is one or more selected from the group consisting of Ag, Zn, Sn, As, Sb, Bi and a rare earth element, and M is one or more selected from the group consisting of Nb, Hf, Zr, Ta, Mo, W and V. In the composition formula, 0.030&#x2264;a&#x2264;0.100, 0.050&#x2264;b&#x2264;0.150, 0&#x3c;c&#x2264;0.030, 0&#x3c;d&#x2264;0.030, &#x3b1;&#x2265;0, &#x3b2;&#x2265;0, and 0&#x2264;&#x3b1;+&#x3b2;&#x2264;0.50 are satisfied. In the soft magnetic alloy, a content of Ti is 0.001 to 0.100 wt %, a content of Mn is 0.001 to 0.150 wt %, and a content of Al is 0.001 to 0.100 wt %.

Soft magnetic metal powder which includes a plurality of soft magnetic metal particles configured by a Fe-based nanocrystal alloy including Cu is provided, wherein the soft magnetic metal particles have core portions and first shell portions surrounding circumferences of the core portions; when an average crystallite size of Cu crystallites existing in the core portions is set as A, and the largest crystallite size of Cu crystallites existing in the first shell portions is set as B, B/A is 3.0 or more and 1000 or less.

Provided is a soft magnetic alloy including Fe, as a main component, and including B. Among 80000 pieces of a grid having 1 nm&#xd7;1 nm&#xd7;1 nm in a continuous measurement range of the soft magnetic alloy, 4000 pieces of the grid from lower Fe content shows B content variation (&#x3c3;B) of 2.8 or more, and an amorphization ratio X of the soft magnetic alloy of 85% or more.

A soft magnetic alloy including a composition having a formula of ((FeX1X2)MBCrCu)C. X1 is one or more elements selected from a group of Co and Ni. X2 is one or more elements selected from a group of W, Al, Mn, Ag, Zn, Sn, As, Sb, Bi, N, O, and rare earth elements. M is one or more elements selected from a group of Nb, Hf, Zr, Ta, Ti, Mo, and V. 0.030&#x2264;a&#x2264;0.14, 0.028&#x2264;b&#x2264;0.15, 0.005&#x2264;d&#x2264;0.020, 0&#x3c;e&#x2264;0.030, 0&#x2264;f&#x2264;0.040, &#x3b1;&#x2265;0, &#x3b2;&#x2265;0, and 0&#x2264;&#x3b1;+&#x3b2;&#x2264;0.50 are satisfied.

A soft magnetic alloy includes a main component of Fe. The soft magnetic alloy includes a Fe composition network phase where regions whose Fe content is larger than an average composition of the soft magnetic alloy are linked. The Fe composition network phase contains Fe content maximum points that are locally higher than their surroundings. A virtual-line total distance per 1 &#x3bc;mof the soft magnetic alloy is 10 mm to 25 mm provided that the virtual-line total distance is a sum of virtual lines linking the maximum points adjacent each other. A virtual-line average distance that is an average distance of the virtual lines is 6 nm or more and 12 nm or less.

Soft magnetic alloy

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.

A soft magnetic powder core which can have a high electrical resistivity, a high magnetic flux density and a high strength easily, and the soft magnetic powder core can be used in various electromagnetic components such as a motor, an actuator, a generator and a reactor. The soft magnetic powder core in which the glass portion is scattered among the soft magnetic particles, the soft magnetic particle having the core particle with iron as the main component and the insulating coating layer containing P, O and Fe. Further, the junction portion with iron oxide as the main component is formed between the soft magnetic particle and the glass portion.

Soft magnetic powder core

A powder magnetic core having a high electrical resistivity and a high magnetic flux density, including at least a composite magnetic particle the composite magnetic particle including: a core particle containing iron as the main component; and an insulating passivation layer formed on the core particle, wherein: the insulating passivation layer at least has an inner layer formed on the core particle and the outermost layer formed on the inner layer; and the outermost layer contains iron oxide as the main component.

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Tokyo, Japan

Seigo Tokoro