Permeability and EMI Characteristics of Fe-Si-Al Alloy Flakes/Polymer Composite

• Yoshida Shigeyoshi

  R & D Center, Tokin Corporation

• Sato Mitsuharu

  Second Production Buisiness Head Quarters, Tokin Corporation

• Sugawara Eishu

  R & D Center, Tokin Corporation

• Shimada Yutaka

  Research Institute for Scientific Measurement, Tohoku University

Bibliographic Information

Other Title

• 偏平状Fe-Si-Al合金粉末・ポリマーマトリックスの透磁率と電磁干渉抑制効果
• ヘンペイジョウ Fe-Si-Al ゴウキンフンマツ ポリマー マトリックス ノ トウジリツ ト デンジ カンショウ ヨクセイ コウカ

Abstract

We investigated the frequency characteristics of permeability for an Fe-Si-Al flakes/polymer composite which has dual frequency dispersion in permeability. From the relation of Curie temperature to the powder surface area, it was found that the mother alloy composition changes with progress of attrition to excess Fe, and as a result, magneto-elastic effect seems to give a large influence on the permeability. Moreover, the results of XPS analysis for bulk samples and compositional dependence of Curie temperature suggests that oxidation of Si and Al at the powder surface leads to excess Fe in the total composition of the powder. Based on these findings, a raw material was prepared adjusting the amount of Fe. Consequently, the Fe-Si-Al flakes/polymer composite exhibits excellent EMI suppressing characteristics in a quasi-microwave band.

Journal

• Journal of the Japan Institute of Metals and Materials

  Journal of the Japan Institute of Metals and Materials 63 (2), 237-242, 1999

  The Japan Institute of Metals and Materials

Keywords

• iron-silicon-aluminum alloy flakes
• permeability characteristics
• frequency dispersion
• Curie temperature
• powder surface
• electromagnetic interference suppression
• near field mode
• quasi-microwave band

Details

• CRID: 1390282681467395712
• NII Article ID: 10002548938
• NII Book ID: AN00187860
• DOI: 10.2320/jinstmet1952.63.2_237
• ISSN: 18806880
• ISSN: 24337501
• ISSN: 00214876
• NDL BIB ID: 4659684
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4659684
• Web Site: https://www.jstage.jst.go.jp/article/jinstmet1952/63/2/63_2_237/_pdf
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed