Seiko Epson Corporation

Toshikuni Sato

Isamu Otsuka

Yu Maeda

Atsushi Nakamura

Yu Maeta

An insulator-coated soft magnetic powder includes a plurality of particles each including a core which contains a soft magnetic material, and an insulating layer which is provided on the surface of the core and contains a glass material including BiOas a main component. The content of an alkali metal in the insulating layer is 5 mol % or less. The glass material further contains at least one of ZnO and BO. The content of BiOin the glass material is 40 mol % or more and 80 mol % or less.

Insulator-coated soft magnetic powder, powder magnetic core, magnetic element, electronic device, and vehicle

A composite particle includes: a particle composed of a soft magnetic metallic material, and a coating layer composed of a soft magnetic metallic material having a different composition from that of the particle and fusion-bonded to the particle so as to cover the particle, wherein when the Vickers hardness of the particle is represented by HV1 and the Vickers hardness of the coating layer is represented by HV2, HV1 and HV2 satisfy the following relationship: 100&#x2266;HV1&#x2212;HV2, and when half of the projected area circle equivalent diameter of the particle is represented by r and the average thickness of the coating layer is represented by t, r and t satisfy the following relationship: 0.05&#x2266;t/r&#x2266;1.

Composite particle of soft-magnetic metallic material, method for producing composite particle, powder core, magnetic element, and portable electronic device

An amorphous alloy powder is composed of an amorphous alloy material containing Fe, Cr, Mn, Si, B, and C as constituent components, and in the amorphous alloy material, Fe is contained as a main component, the content of Cr is 0.5 at % or more and 3 at % or less, the content of Mn is 0.02 at % or more and 3 at % or less, the content of Si is 10 at % or more and 14 at % or less, the content of B is 8 at % or more and 13 at % or less, and the content of C is 1 at % or more and 3 at % or less. By using such an amorphous alloy powder, a dust core which reduces iron loss and decreases magnetostriction can be obtained.

Amorphous alloy powder, dust core, magnetic element, and electronic device

A soft magnetic powder containing an amorphous alloy material having an alloy composition represented by FeMnSiBCwherein a, b, c and d each represent a proportion in terms of percent by atom, and satisfy 0.1&#x2266;a&#x2266;10, 3&#x2266;b&#x2266;15, 3&#x2266;c&#x2266;15, and 0.1&#x2266;d&#x2266;3.

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Hachinohe, Japan

Toshikuni Sato