Composite electromagnetic wave absorber made of Ni-Zn ferrite particles dispersed and isolated in an SiO2 medium

Kenji Sakai, Yang Guan, Yuuki Sato, Shinzo Yoshikado

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

Abstract

In order to design a ferrite absorber that can be used at frequencies of several GHz, the frequency dependences of the relative complex permeability μr*, the relative complex permittivity s r*, and return loss were investigated for a composite made of Ni-Zn ferrite and SiO2. When ferrite particles were dispersed and isolated in an SiO2 medium, the frequency dependence of μr* was different from that for a composite made of SiO2 particles dispersed and isolated in the ferrite medium. Moreover, when ferrite particles were isolated and a suitable mixture ratio of ferrite and SiO2 was selected, the return loss was less than -20 dB at frequencies of several GHz. The dispersion states of ferrite and SiO 2 particles are thus important factors to design an absorber, and improvement in the absorption characteristics of the ferrite tile which is used as a practical absorber could be achieved using a composite made of Ni-Zn ferrite particles dispersed and isolated in an SiO2 medium.

Original languageEnglish
Title of host publicationElectroceramics in Japan XIV
PublisherTrans Tech Publications Ltd
Pages229-232
Number of pages4
ISBN (Print)9783037851821
DOIs
Publication statusPublished - Jan 1 2011
Externally publishedYes

Publication series

NameKey Engineering Materials
Volume485
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Keywords

  • Composite
  • Electromagnetic wave absorber
  • Isolated model
  • Ni-Zn ferrite
  • Relative complex permeability

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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  • Cite this

    Sakai, K., Guan, Y., Sato, Y., & Yoshikado, S. (2011). Composite electromagnetic wave absorber made of Ni-Zn ferrite particles dispersed and isolated in an SiO2 medium. In Electroceramics in Japan XIV (pp. 229-232). (Key Engineering Materials; Vol. 485). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/KEM.485.229