Combined use of magnetic and electrically conductive fillers in a polymer matrix for electromagnetic interference shielding

Junhua Wu; D. D.L. Chung

doi:10.1007/s11664-008-0486-4

Combined use of magnetic and electrically conductive fillers in a polymer matrix for electromagnetic interference shielding

Junhua Wu
, D. D.L. Chung

Department of Mechanical and Aerospace Engineering

University at Buffalo

SUNY Buffalo
Parker Hennifin Co.

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

56 Scopus citations

Abstract

The combined use of a highly magnetic filler (mumetal) in low proportion and a highly conductive filler in high proportion in a polymer matrix provides a composite material that is more effective for electromagnetic interference shielding than the use of a highly magnetic filler alone or the use of a highly conductive filler alone. Mumetal is effective (due to absorption) when it is in a composite material of DC electrical resistivity below 10 Ω cm, as provided by conductive fillers, which contribute to shielding by reflection and allow paths for eddy current.

Original language	English
Pages (from-to)	1088-1094
Number of pages	7
Journal	Journal of Electronic Materials
Volume	37
Issue number	8
DOIs	https://doi.org/10.1007/s11664-008-0486-4
State	Published - Aug 2008

Keywords

Composite
EMI
Electrical resistivity
Electromagnetic
Graphite
Magnetic
Mumetal
Nickel
Polymer
Shielding

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10.1007/s11664-008-0486-4

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abstract = "The combined use of a highly magnetic filler (mumetal) in low proportion and a highly conductive filler in high proportion in a polymer matrix provides a composite material that is more effective for electromagnetic interference shielding than the use of a highly magnetic filler alone or the use of a highly conductive filler alone. Mumetal is effective (due to absorption) when it is in a composite material of DC electrical resistivity below 10 Ω cm, as provided by conductive fillers, which contribute to shielding by reflection and allow paths for eddy current.",

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AB - The combined use of a highly magnetic filler (mumetal) in low proportion and a highly conductive filler in high proportion in a polymer matrix provides a composite material that is more effective for electromagnetic interference shielding than the use of a highly magnetic filler alone or the use of a highly conductive filler alone. Mumetal is effective (due to absorption) when it is in a composite material of DC electrical resistivity below 10 Ω cm, as provided by conductive fillers, which contribute to shielding by reflection and allow paths for eddy current.

KW - Composite

KW - EMI

KW - Electrical resistivity

KW - Electromagnetic

KW - Graphite

KW - Magnetic

KW - Mumetal

KW - Nickel

KW - Polymer

KW - Shielding

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JF - Journal of Electronic Materials

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ER -

Combined use of magnetic and electrically conductive fillers in a polymer matrix for electromagnetic interference shielding

Abstract

Keywords

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