Electromagnetic wave absorption properties of nanocomposite powders derived from intermetallic compounds and amorphous carbon

Masahiro Itoh, Jiu Rong Liu, Takashi Horikawa, Ken Ichi Machida

Research output: Contribution to journalConference articlepeer-review

38 Citations (Scopus)

Abstract

Nanocomposite materials consisting of Y2Fe17 and amorphous carbon (a-C) were prepared by a mechanical grinding method. Mean crystalline size of the Y2Fe17 particles in the nanocomposite materials was evaluated to be 20 nm from the line broadening of diffraction peaks. Complex permittivity, permeability and electromagnetic wave absorption properties of resin compact containing 75 wt.% Y2Fe 17/a-C powders showed the good electromagnetic wave absorption properties of the minimum reflection loss (RL) value of - 48 dB at 17 GHz with a matching thickness of a 1.3 mm because the eddy current loss was effectively suppressed by increasing the electric resistance for Y2Fe 17 particle with hybridization with a-C as an insulator.

Original languageEnglish
Pages (from-to)1400-1403
Number of pages4
JournalJournal of Alloys and Compounds
Volume408-412
DOIs
Publication statusPublished - 2006 Feb 9
EventProceedings of the Rare Earths'04 in Nara, Japan -
Duration: 2004 Nov 72004 Nov 12

Keywords

  • Electromagnetic wave absorption
  • GHz range
  • Magnetic anisotropy
  • Mechanical grinding
  • Nanocomposite

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