Seiko Epson Corporation

Yu Maeda

Isamu Otsuka

Yasuko Kudo

Toshikuni Sato

Toshiki Akazawa

A soft magnetic powder of the invention has a composition represented by FeCuSiBMM'X(at %) [wherein M is Nb, W, Ta, Zr, Hf, Ti, or Mo, M&#x2032; is V, Cr, Mn, Al, a platinum group element, Sc, Y, Au, Zn, Sn, or Re, X is C, P, Ge, Ga, Sb, In, Be, or As, and a, b, c, d, e, and f are numbers that satisfy the following formulae: 0.1&#x2264;a&#x2264;3, 0&#x3c;b&#x2264;30, 0&#x3c;c&#x2264;25, 5&#x2264;b+c&#x2264;30, 0.1&#x2264;d&#x2264;30, 0&#x2264;e&#x2264;10, and 0&#x2264;f&#x2264;10], wherein a crystalline structure having a particle diameter of 1 nm or more and 30 nm or less is contained in an amount of 40 vol % or more, and the difference in the coercive force of the powder after classification satisfies predetermined conditions.

Soft magnetic powder, powder magnetic core, magnetic element, and 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

Yu Maeda