Magnetic properties of high permeability iron powder `KIP MG270H' for line filter cores

Yukiko Ozaki, Masashi Fujinaga

研究成果: ジャーナルへの寄稿記事

1 引用 (Scopus)

抄録

The initial permeability of reduced iron powder cores has been investigated in relation to the effects of material characteristics dependence, impurity concentration, grain size and residual strain introduced during the compacting process. The reduction of impurities (O, C, P and S) and coarsening of grains have been found effective for improving the permeability. Transmission electron microscope observation around the grain boundaries of an iron particle revealed that nonmagnetic inclusions are formed along the grain boundaries with sizes comparable to the domain wall thickness of pure iron. This fact suggests that the grain boundaries act as the sites of strong pinning of the domain wall displacement. On the basis of these findings, Kawasaki Steel has developed a new reduced iron powder `KIP MG270H', realizing permeability higher than the conventional materials up to several hundreds Hertz. This material is applicable to line noise filter cores.

元の言語英語
ページ(範囲)30-35
ページ数6
ジャーナルKawasaki Steel Technical Report
発行部数42
出版物ステータス出版済み - 5 1 2000
外部発表Yes

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Iron powder
Magnetic properties
Grain boundaries
Domain walls
Iron
Impurities
Steel
Coarsening
Electron microscopes

All Science Journal Classification (ASJC) codes

  • Metals and Alloys

これを引用

Magnetic properties of high permeability iron powder `KIP MG270H' for line filter cores. / Ozaki, Yukiko; Fujinaga, Masashi.

:: Kawasaki Steel Technical Report, 番号 42, 01.05.2000, p. 30-35.

研究成果: ジャーナルへの寄稿記事

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