Tdk Corporation

Ryoma Nakazawa

Takeshi Takahashi

Hiroyuki Ono

Yousuke Futamata

Junichi Shimamura

Kazuhiro Yoshidome

Masahiro Kamiya

Yasuhide Yamashita

Katsushi Yasuhara

Chiomi Sato

Yusuke Taniguchi

Ayumi Tsuchida

A dust core includes magnetic particles, an epoxy resin, and an additive. The epoxy resin has at least two or more mesogenic skeletons between two epoxy bonds adjacent along a molecular chain. The additive includes one or more metallic elements selected from Li, Ba, Mg, and Ca.

Dust core and electronic device

A dust core including soft magnetic metal particles and a grain boundary phase, wherein the grain boundary phase includes Si and Ti.

Dust core and magnetic component

A soft magnetic powder capable of maintaining high insulation resistance even after exposure to a high-temperature environment, a dust core, and an electronic component is provided with the dust core. A soft magnetic powder including soft magnetic metal particles, the surfaces of which are covered by an inorganic insulating coating, the inorganic insulating coating having a first coating part in contact with the surfaces of the soft magnetic metal particles, and a second coating part formed on the outside of the first coating part, the first coating part including phosphorus and oxygen, and the second coating part including silicon and oxygen.

Soft magnetic powder, magnetic core, and electronic component

A soft magnetic alloy powder contains soft magnetic alloy particles. The soft magnetic alloy particles contain Fe and Si. The soft magnetic alloy particles each include crystal grains and crystal grain boundary between the crystal grains. At least one of the crystal grains has a Si segregation part.

Soft magnetic alloy powder, dust core, and coil component

A dust core includes a metal magnetic material and a resin. Fine particles exist on a surface of the dust core.

Dust core

A dust core including a metal magnetic powder and a resin, in which the metal magnetic powder shows a particle diameter of more than 0 &#x3bc;m and 200 &#x3bc;m or less, a number percentage of 5.0% or more of metal magnetic particles among the metal magnetic particles composing the metal magnetic powder are at least partially surface-coated with an inorganic compound including an alkaline earth metal, in a coating part coating the metal magnetic particles, an amount of the alkaline earth metal is 10.0 mass % or more, when a total amount of a metal element included in the coating part is 100 mass %, is provide. The dust core is superior in a corrosion-resistance.

A dust core includes a metal magnetic material, a resin, and an insulation film. The insulation film contacts with a surface of the metal magnetic material and covers the metal magnetic material. The insulation film includes a first film and a second film. The first film contacts with the surface of the metal magnetic material. The second film contacts with a surface of the first film. A density of the first film is higher than a density of the second film.

A composite body has a cermet member, a metal member and an intermediate member. The cermet member includes a cermet oxide phase and a cermet metal phase. The cermet oxide phase contains a Ni-containing oxide or an Fe-containing oxide. The cermet metal phase contains Ni. The intermediate layer contains Cu. The mass proportions of Cu in the cermet metal phase at points which are spaced apart by 10, 50, 100 and 1000 &#x3bc;m from the interface between the cermet member and the intermediate layer to the cermet member side are denoted by C10, C50, C100 and C1000 (mass %). When the mass proportions of Cu in the cermet oxide phase at points which are spaced apart by 10 and 100 &#x3bc;m from the interface to the cermet member side are denoted by M10 and M100 (mass %), C10&#x3e;C50&#x3e;C100&#x3e;C1000, and 5&#x3e;M10&#x2212;M100&#x3e;&#x2212;5.

Composite body

A dust core includes a metal magnetic material, a resin, an insulation film, and an intermediate layer. The insulation film covers the metal magnetic material. The intermediate layer exists between the insulation film and the metal magnetic material and contacts therebetween. The metal magnetic material includes 85 to 99.5 wt % of Fe, 0.5 to 10 wt % of Si, and 0 to 5 wt % of other elements, with respect to 100 wt % of the entire metal magnetic material. The intermediate layer includes a Fe&#x2014;Si&#x2014;O based oxide. The insulation film includes a Si&#x2014;O based oxide.

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Tokyo, Japan

Ryoma Nakazawa