AMORPHOUS SOFT MAGNETIC ALLOY POWDER

摘要

PROBLEM TO BE SOLVED: To put amorphous soft magnetic alloy powder for a powder magnetic core capable of maintaining low loss even in a high frequency region to practical use, thus to provide a powder magnetic core for an inductor component capable of dealing with large electric current and having excellent low loss properties.

SOLUTION: The powder magnetic core is formed of amorphous soft magnetic alloy powder and a binder. The amorphous soft magnetic alloy powder is composed of crushed grains having a mean grain size of 3 to 10 μm, and in which ≥50% of the powder has an aspect ratio of ≤2. The amorphous soft magnetic alloy powder is produced by a high speed powder reactor 10 provided with: pulverizing medium balls 3 made of at least either metal or zirconia; and a variable guide vane 4.

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