| 摘要 |
PURPOSE:To reduce magnetic gap, and improve magnetic characteristics, by providing compressed powder core composed of flat-shaped soft magnet alloy powder and insulator and a metal outer pipe accommodating said core, orientating the flat surface of the soft magnetic powder in the axial direction of the metal outer pipe, and constituting the soft magnetic alloy powder of Fe-Ni alloy. CONSTITUTION:Compressed powder core composed of flat-shaped soft magnetic alloy powder and insulator and a metal outer pipe accommodating said core are provided, and the flat surface of the soft magnetic alloy powder is orientated in the axial direction of the metal outer pipe. The soft magnetic alloy powder is Fe-Ni alloy composed of Ni equal to or larger than 60wt.% and equal to or smaller than 90wt.% and impurities which are inevitably contained. Fe equal to or smaller than 5wt.% which constitutes the soft magnetic alloy powder may be replaced by at least one of group IVa, group Va, and group VIa elements in the periodic table and Cu. The aspect ratio of soft magnetic alloy powder is desirably set larger than or equal to 5. |
