Flexible design of composite electromagnetic wave absorber made of aluminum and sendust particles dispersed in polystyrene resin

Kenji Sakai, Yoichi Wada, Yuuki Sato, Shinzo Yoshikado

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

For the purpose of designing electromagnetic wave absorbers with good absorption properties at frequencies above 1 GHz, the frequency dependences of the relative complex permeability μr,* the relative complex permittivity εr", and the return loss were investigated for the composite made of both sendust (an alloy of Al 5%, Si 10%, and Fe 85%) and aluminum particles dispersed in polystyrene resin, The effects of the magnetic resonance caused by sendust and magnetic moments caused by sendust and aluminum on the frequency dependence of μr* were observed in the composite made of both sendust and aluminum. Thus, it was found that the frequency dependence of μr* for the composite made of sendust can be changed by adding aluminum particles in the composite made of sendust. Moreover, when each volume mixture ratio of sendust and aluminum was varied without changing the total volume mixture ratio of sendust and aluminum, the frequency dependence of μr* was different despite the value of εr*was almost the same, This result leads to a flexible design of an absorber with good absorption characteristics because the frequency dependence of μr* can be controlled by selecting suitable volume mixture ratio of sendust and aluminum without changing the vale of εr*. The composite made of both sendust and aluminum was found to exhibit a return loss of less than -20 dB in the frequency range of not only several GHz but also around 20 GHz, Furthermore, the reduction in weight of an absorber could be also possible since the aluminum is low mass density.

Original languageEnglish
Title of host publicationAdvances in Multifunctional Materials and Systems - A Collection of Papers Presented at the 8th Pacific Rim Conference on Ceramic and Glass Technology, PACRIM 8
PublisherAmerican Ceramic Society
Pages137-152
Number of pages16
ISBN (Print)9780470890585
DOIs
Publication statusPublished - Jan 1 2010
Event8th Pacific Rim Conference on Ceramic and Glass Technology, PACRIM-8 - Vancouver, BC, Canada
Duration: May 31 2009Jun 5 2009

Publication series

NameCeramic Transactions
Volume216
ISSN (Print)1042-1122

Other

Other8th Pacific Rim Conference on Ceramic and Glass Technology, PACRIM-8
CountryCanada
CityVancouver, BC
Period5/31/096/5/09

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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  • Cite this

    Sakai, K., Wada, Y., Sato, Y., & Yoshikado, S. (2010). Flexible design of composite electromagnetic wave absorber made of aluminum and sendust particles dispersed in polystyrene resin. In Advances in Multifunctional Materials and Systems - A Collection of Papers Presented at the 8th Pacific Rim Conference on Ceramic and Glass Technology, PACRIM 8 (pp. 137-152). (Ceramic Transactions; Vol. 216). American Ceramic Society. https://doi.org/10.1002/9780470909850.ch15