Soft magnetic powder, dust core, magnetic components and electronic equipment

Abstract

The present invention provides soft magnetic powder, powder magnetic core, magnetic element, and electronic equipment, soft magnetic powder capable of ensuring high insulation between particles during powder compaction, and a powder magnetic core and magnetic element that optimize magnetic properties with low loss , and a highly reliable electronic device including the magnetic element. The soft magnetic powder of the present invention has Fe 100‑a‑b‑c‑d‑e‑f Cu a Si b B c m d M' e x f (Atomic %) (wherein, M is Nb, W, Ta, Zr, Hf, Ti or Mo, M' is V, Cr, Mn, Al, platinum group elements, Sc, Y, Au, Zn, Sn or Re, X is C, P, Ge, Ga, Sb, In, Be or As, a, b, c, d, e, f satisfy 0.1≤a≤3, 0<b≤30, 0<c≤25, 5 ≤ b + c ≤ 30, 0.1 ≤ d ≤ 30, 0 ≤ e ≤ 10 and 0 ≤ f ≤ 10.) The composition represented by the composition contains more than 40% by volume of crystal structures with a particle size of 1 nm to 30 nm, and the particle size The Vickers hardness is not less than 1000 and not more than 3000.

Description

technical field [0001] The invention relates to soft magnetic powder, powder magnetic core, magnetic element and electronic equipment. Background technique [0002] In recent years, the miniaturization and weight reduction of mobile devices such as notebook computers have been progressing, but in order to achieve both miniaturization and high performance, it is necessary to increase the frequency of switching power supplies. At present, the high frequency is being promoted so that the driving frequency of the switching power supply reaches several 100kHz. However, with this, it is also necessary to cope with the high frequency for magnetic components such as choke coils and inductors built in mobile devices. . [0003] For example, in Patent Document 1, there is disclosed a powder magnetic core comprising Fe (100-X-Y-Z-α-β) B X Si Y Cu Z m α M' β (Atomic %) (wherein, M is at least one element selected from the group consisting of Nb, W, Ta, Zr, Hf, Ti, Mo, and M' is s...

AI Technical Summary

Problems solved by technology

However, if the ratio of the insulating material is reduced, the particles of the magnetic powder tend to come into contact with each other, and the insulation between the particles cannot be ensured.

Therefore, a certain amount of insulating material is required, and the magnetic characteristics of the powder core cannot be sufficiently improved because the ratio of the magnetic powder in the powder core decreases.

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