Effects of particle size and porosity on electromagnetic and electromagnetic wave absorbing properties of the epoxy-ferrite composites

Hyung Do Choi, Wang Sup Kim, In Soo Jeon, Ho Gyu Yoon, Tak Jin Moon

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

In this study, the effects of particle size and porosity on electromagnetic and electromagnetic wave absorbing properties of an epoxy-ferrite composite were investigated. The complex permeability, permittivity and electromagnetic attenuation value of the composite were obtained using an impedance/gain phase analyzer (HP4194A) and a network analyzer (HP8753C) in the frequency range from 1 MHz to 5 GHz. The complex permeability of the composite and the real part of permittivity increased with increasing the particle size of ferrite. The imaginary part of permittivity was independent of the particle size. The relaxation spectrum of the complex permeability had gotten broad with increasing the porosity of composite. The particle size distribution had an effect on the complex permeability of composite. However the complex permittivity was independent of the particle size. The attenuation frequency range could be changed by controlling the particle size and the particle size distribution of ferrite at the given ferrite content.

Original languageEnglish
Pages (from-to)112-118
Number of pages7
JournalPolymer (Korea)
Volume21
Issue number1
Publication statusPublished - 1996 Dec 1

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Electromagnetic waves
Ferrite
Porosity
Particle size
Permittivity
Composite materials
Particle size analysis
Electric network analyzers

Keywords

  • Attenuation
  • Complex permeability
  • Composite
  • Particle size

ASJC Scopus subject areas

  • Polymers and Plastics
  • Materials Chemistry

Cite this

Effects of particle size and porosity on electromagnetic and electromagnetic wave absorbing properties of the epoxy-ferrite composites. / Choi, Hyung Do; Kim, Wang Sup; Jeon, In Soo; Yoon, Ho Gyu; Moon, Tak Jin.

In: Polymer (Korea), Vol. 21, No. 1, 01.12.1996, p. 112-118.

Research output: Contribution to journalArticle

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