| 摘要 |
The present invention provides a dust core including, as principal components, a pulverized powder of an Fe-based amorphous alloy ribbon corresponding to a first magnetic body; and a Cr-containing Fe-based amorphous alloy atomized spherical powder corresponding to a second magnetic body, and the pulverized powder is in the shape of a thin plate having two principal planes opposing each other, and assuming that a minimum dimension along a plane direction of the principal planes is a grain size, the pulverized powder includes a pulverized powder with a grain size more than twice and not more than six times as large as a thickness of the pulverized powder in a proportion of 80 mass% or more of the whole pulverized powder and includes a pulverized powder with a grain size not more than twice as large as the thickness of the pulverized powder in a portion of 20 mass% or less of the whole pulverized powder, and the atomized spherical powder has a grain size not more than a half of the thickness of the pulverized powder and not less than 3 µm. |
