| 摘要 |
PROBLEM TO BE SOLVED: To provide a cable having a structure superior in magnetic shielding effect by mixing a nano crystalline magnetic powder with resin, and covering the circumference of a conductor with this in a tubular form. SOLUTION: A powder of amorphous alloy is prepared by water atomization and successively heated at a crystallizing temperature or higher for fine crystallization. When the average particle size of a nano crystalline magnetic power exceeds 500μm, a homogeneous amorphous is hardly provided in the powder preparation, and superior soft magnetic characteristic is hardly obtained in the following crystallization by heating. Thus, a powder of 500μm or less is preferably used. The resulting nano crystalline alloy powder is mixed uniformly with a resin, and molded into a tube form around a conductor by extrusion molding. The nano crystalline magnetic powder substantially consists of a fine crystalline particle powder 100 nm or less and specifically, a fine crystalline material of bccFe base, such as Fe-Cu-Nb-Si-B or Fe-Zr-B.
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