Composite electromagnetic wave absorber made of soft magnetic material and polystyrene resin and control of permeability and permittivity

Kenji Sakai; Norizumi Asano; Yoichi Wada; Shinzo Yoshikado

doi:10.1016/j.jeurceramsoc.2009.05.044

Composite electromagnetic wave absorber made of soft magnetic material and polystyrene resin and control of permeability and permittivity

Kenji Sakai, Norizumi Asano, Yoichi Wada, Shinzo Yoshikado

Research output: Contribution to journal › Article › peer-review

20 Citations (Scopus)

Abstract

The frequency dependences of the relative complex permeability μ_r^*, the relative complex permittivity ε{lunate}_r^* and the absorption characteristics for composite electromagnetic wave absorbers made of polystyrene resin and sendust particles or permalloy particles were investigated in the frequency range from 1 to 40 GHz. The size of sendust particles was varied between approximately 5 and 20 μm and the particle size dependence of μ_r^* was observed. The value of μ_r^* was shown to be controlled by adjusting the particle size of sendust, and an electromagnetic wave absorber with a flexible design was proposed. A metal-backed single-layer absorber made of sendust particles or permalloy particles absorbed more than 99% of electromagnetic wave power at frequencies above 20 GHz. In addition, a composite made of 5 μm particles exhibited a return loss of less than -20 dB in the frequency range of not only several GHz but also above 30 GHz.

Original language	English
Pages (from-to)	347-353
Number of pages	7
Journal	Journal of the European Ceramic Society
Volume	30
Issue number	2
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2009.05.044
Publication status	Published - Jan 2010
Externally published	Yes

Keywords

Composites
Electromagnetic wave absorber
Hot pressing
Magnetic properties
Soft magnets

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

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10.1016/j.jeurceramsoc.2009.05.044

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title = "Composite electromagnetic wave absorber made of soft magnetic material and polystyrene resin and control of permeability and permittivity",

abstract = "The frequency dependences of the relative complex permeability μr*, the relative complex permittivity ε{lunate}r* and the absorption characteristics for composite electromagnetic wave absorbers made of polystyrene resin and sendust particles or permalloy particles were investigated in the frequency range from 1 to 40 GHz. The size of sendust particles was varied between approximately 5 and 20 μm and the particle size dependence of μr* was observed. The value of μr* was shown to be controlled by adjusting the particle size of sendust, and an electromagnetic wave absorber with a flexible design was proposed. A metal-backed single-layer absorber made of sendust particles or permalloy particles absorbed more than 99% of electromagnetic wave power at frequencies above 20 GHz. In addition, a composite made of 5 μm particles exhibited a return loss of less than -20 dB in the frequency range of not only several GHz but also above 30 GHz.",

keywords = "Composites, Electromagnetic wave absorber, Hot pressing, Magnetic properties, Soft magnets",

author = "Kenji Sakai and Norizumi Asano and Yoichi Wada and Shinzo Yoshikado",

note = "Funding Information: This work was supported by Kyoto Prefecture Collaboration of Regional Entities for the Advancement of Technological Excellence, JST, the RCAST of Doshisha University, the Joint Research Project in the Kyoto Prefectural Area and Nippon Atomized Metal Powders Corporation.",

year = "2010",

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doi = "10.1016/j.jeurceramsoc.2009.05.044",

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journal = "Journal of the European Ceramic Society",

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AU - Sakai, Kenji

AU - Asano, Norizumi

AU - Wada, Yoichi

AU - Yoshikado, Shinzo

N1 - Funding Information: This work was supported by Kyoto Prefecture Collaboration of Regional Entities for the Advancement of Technological Excellence, JST, the RCAST of Doshisha University, the Joint Research Project in the Kyoto Prefectural Area and Nippon Atomized Metal Powders Corporation.

PY - 2010/1

Y1 - 2010/1

N2 - The frequency dependences of the relative complex permeability μr*, the relative complex permittivity ε{lunate}r* and the absorption characteristics for composite electromagnetic wave absorbers made of polystyrene resin and sendust particles or permalloy particles were investigated in the frequency range from 1 to 40 GHz. The size of sendust particles was varied between approximately 5 and 20 μm and the particle size dependence of μr* was observed. The value of μr* was shown to be controlled by adjusting the particle size of sendust, and an electromagnetic wave absorber with a flexible design was proposed. A metal-backed single-layer absorber made of sendust particles or permalloy particles absorbed more than 99% of electromagnetic wave power at frequencies above 20 GHz. In addition, a composite made of 5 μm particles exhibited a return loss of less than -20 dB in the frequency range of not only several GHz but also above 30 GHz.

AB - The frequency dependences of the relative complex permeability μr*, the relative complex permittivity ε{lunate}r* and the absorption characteristics for composite electromagnetic wave absorbers made of polystyrene resin and sendust particles or permalloy particles were investigated in the frequency range from 1 to 40 GHz. The size of sendust particles was varied between approximately 5 and 20 μm and the particle size dependence of μr* was observed. The value of μr* was shown to be controlled by adjusting the particle size of sendust, and an electromagnetic wave absorber with a flexible design was proposed. A metal-backed single-layer absorber made of sendust particles or permalloy particles absorbed more than 99% of electromagnetic wave power at frequencies above 20 GHz. In addition, a composite made of 5 μm particles exhibited a return loss of less than -20 dB in the frequency range of not only several GHz but also above 30 GHz.

KW - Composites

KW - Electromagnetic wave absorber

KW - Hot pressing

KW - Magnetic properties

KW - Soft magnets

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Composite electromagnetic wave absorber made of soft magnetic material and polystyrene resin and control of permeability and permittivity

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Keywords

ASJC Scopus subject areas

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