Facile synthesis and enhanced electromagnetic wave absorption of thorny-like Fe-Ni alloy/ordered mesoporous carbon composite

Shaoli Guo; Liuding Wang; Hongjing Wu

doi:10.1016/j.apt.2015.06.007

Facile synthesis and enhanced electromagnetic wave absorption of thorny-like Fe-Ni alloy/ordered mesoporous carbon composite

Shaoli Guo, Liuding Wang, Hongjing Wu

School of Physical Science and Technology

Northwestern Polytechnical University Xian

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

48 Scopus citations

Abstract

Abstract Ordered mesoporous carbon (OMC) coated with thorny-like Fe-Ni alloy composites have been successfully synthesized. The electromagnetic (EM) parameters of Fe-Ni alloy/OMC/paraffin wax composites were measured. Interestingly, the μ″ values of Fe-Ni(0.2)/OMC were very negative from ∼7 to 18 GHz and the minimum value was -0.7, which are mainly caused by the eddy current. The reflection loss (RL) values were calculated with the measured EM parameters based on the transmission line theory. Results showed that the effective absorption bandwidth (<-10 dB) of Fe-Ni(0.2)/OMC/paraffin wax composites with the thickness of 2.00 mm could reach up to 4.8 GHz. The enhanced EM wave-absorbing properties of the composites could be attributed to well impedance matching between the absorber and air. Moreover, the enhanced dielectric loss and magnetic loss induced by Fe-Ni alloy also played a crucial role in the EM wave-absorbing process.

Original language	English
Pages (from-to)	1250-1255
Number of pages	6
Journal	Advanced Powder Technology
Volume	26
Issue number	4
DOIs	https://doi.org/10.1016/j.apt.2015.06.007
State	Published - 1 Jul 2015

Keywords

EM wave absorption
Fe-Ni alloy
Impedance matching
Negative imaginary permeability
OMC

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title = "Facile synthesis and enhanced electromagnetic wave absorption of thorny-like Fe-Ni alloy/ordered mesoporous carbon composite",

abstract = "Abstract Ordered mesoporous carbon (OMC) coated with thorny-like Fe-Ni alloy composites have been successfully synthesized. The electromagnetic (EM) parameters of Fe-Ni alloy/OMC/paraffin wax composites were measured. Interestingly, the μ″ values of Fe-Ni(0.2)/OMC were very negative from ∼7 to 18 GHz and the minimum value was -0.7, which are mainly caused by the eddy current. The reflection loss (RL) values were calculated with the measured EM parameters based on the transmission line theory. Results showed that the effective absorption bandwidth (<-10 dB) of Fe-Ni(0.2)/OMC/paraffin wax composites with the thickness of 2.00 mm could reach up to 4.8 GHz. The enhanced EM wave-absorbing properties of the composites could be attributed to well impedance matching between the absorber and air. Moreover, the enhanced dielectric loss and magnetic loss induced by Fe-Ni alloy also played a crucial role in the EM wave-absorbing process.",

keywords = "EM wave absorption, Fe-Ni alloy, Impedance matching, Negative imaginary permeability, OMC",

author = "Shaoli Guo and Liuding Wang and Hongjing Wu",

note = "Publisher Copyright: {\textcopyright} 2015 The Society of Powder Technology Japan.",

year = "2015",

month = jul,

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doi = "10.1016/j.apt.2015.06.007",

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T1 - Facile synthesis and enhanced electromagnetic wave absorption of thorny-like Fe-Ni alloy/ordered mesoporous carbon composite

AU - Guo, Shaoli

AU - Wang, Liuding

AU - Wu, Hongjing

PY - 2015/7/1

Y1 - 2015/7/1

N2 - Abstract Ordered mesoporous carbon (OMC) coated with thorny-like Fe-Ni alloy composites have been successfully synthesized. The electromagnetic (EM) parameters of Fe-Ni alloy/OMC/paraffin wax composites were measured. Interestingly, the μ″ values of Fe-Ni(0.2)/OMC were very negative from ∼7 to 18 GHz and the minimum value was -0.7, which are mainly caused by the eddy current. The reflection loss (RL) values were calculated with the measured EM parameters based on the transmission line theory. Results showed that the effective absorption bandwidth (<-10 dB) of Fe-Ni(0.2)/OMC/paraffin wax composites with the thickness of 2.00 mm could reach up to 4.8 GHz. The enhanced EM wave-absorbing properties of the composites could be attributed to well impedance matching between the absorber and air. Moreover, the enhanced dielectric loss and magnetic loss induced by Fe-Ni alloy also played a crucial role in the EM wave-absorbing process.

AB - Abstract Ordered mesoporous carbon (OMC) coated with thorny-like Fe-Ni alloy composites have been successfully synthesized. The electromagnetic (EM) parameters of Fe-Ni alloy/OMC/paraffin wax composites were measured. Interestingly, the μ″ values of Fe-Ni(0.2)/OMC were very negative from ∼7 to 18 GHz and the minimum value was -0.7, which are mainly caused by the eddy current. The reflection loss (RL) values were calculated with the measured EM parameters based on the transmission line theory. Results showed that the effective absorption bandwidth (<-10 dB) of Fe-Ni(0.2)/OMC/paraffin wax composites with the thickness of 2.00 mm could reach up to 4.8 GHz. The enhanced EM wave-absorbing properties of the composites could be attributed to well impedance matching between the absorber and air. Moreover, the enhanced dielectric loss and magnetic loss induced by Fe-Ni alloy also played a crucial role in the EM wave-absorbing process.

KW - EM wave absorption

KW - Fe-Ni alloy

KW - Impedance matching

KW - Negative imaginary permeability

KW - OMC

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DO - 10.1016/j.apt.2015.06.007

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EP - 1255

JO - Advanced Powder Technology

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IS - 4

ER -

Facile synthesis and enhanced electromagnetic wave absorption of thorny-like Fe-Ni alloy/ordered mesoporous carbon composite

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Keywords

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