Microwave Dielectric Properties of Carbon Nanotube Composites

Liu, L.; Kong, Luo; Wang, Yin; Chen, Yuan; Matitsine, S.

doi:10.5772/39420

Cited by 11 publications

(12 citation statements)

References 37 publications

(30 reference statements)

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“…The existing EM material characterization methods [10][11][12][13][14] can be divided into several groups including free-space, waveguide, resonating cavity, 3D resonator, transmission line, open coaxial, evanescent probe and a parallel-plate capacitor method. The discussion of the application range, advantages and drawbacks of these methods can be found elsewhere [10][11][12][13][14] . As a rule, most of the abovementioned methods require sufficiently large CNT samples covering the area of at least 0.25λx0.5λ, where λ is a wavelength of radiation in free space.…”

Section: Introductionmentioning

confidence: 99%

Characterization of microwave absorption in carbon nanotubes using resonance aperture transmission method

Malyuskin

Brunet

Mariotti

et al. 2020

Journal of Applied Physics

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A new method to characterize microwave electromagnetic (EM) absorption of a bulk carbon nanotube (CNT) material is proposed and experimentally evaluated in this paper. The method is based on the measurement of microwave transmission through a capacitive-resonator aperture (CRA) in a conductive screen loaded with a CNT sample under test. This method allows to measure microwave permittivity and absorption of thin samples (~ 0.1μm-10μm thick) with linear dimensions much smaller than the wavelength of radiation in free space. This "minimal" sample requirement restricts the application of conventional microwave characterization methods such as free-space or waveguide permittivity characterization. It is demonstrated that the resonance E-field enhancement inside the CRA leads to strong EM interaction of the microwave E-field with the CNT sample under test thus enabling high sensitivity and dynamic range (~ 5dB) of the measurement procedure. Another advantage of the proposed technique over conventional non-resonance characterization methods is that in the resonance transmission band, the CRA operation is reflection-less which leads to a relatively simple qualitative algebraic de-embedding procedure of the material parameters based on the principle of energy conservation. The experimental microwave absorption data of the multiwall CNT samples are presented in the S frequency band (2-4GHz), demonstrating microwave absorption properties of the multiwall CNT ribbons.

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Section: Introductionmentioning

confidence: 99%

Characterization of microwave absorption in carbon nanotubes using resonance aperture transmission method

Malyuskin

Brunet

Mariotti

et al. 2020

Journal of Applied Physics

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“…Those properties determine how well energy from the high-frequency alternating electric fields can be absorbed and thus how rapidly the materials will be heated. The dielectric properties of the load materials are also important in the design of the radio frequency or microwave power equipment [11] [12].…”

Section: Introductionmentioning

confidence: 99%

“…The dielectric properties are dependent also on the presence of mobile ions and the permanent dipole moments. The distribution of the phases, including voids and cracks, has also a major influence on the dielectric properties of the composite materials [12] [15].…”

Section: Introductionmentioning

confidence: 99%

Some Factors Influencing the Dielectric Properties of Natural Rubber Composites Containing Different Carbon Nanostructures

Al‐Ghamdi¹,

Al‐Hartomy²,

Al-Solamy³

et al. 2016

MSA

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Natural rubber based composites containing different carbon nanofillers (fullerenes, carbon nanotubes (CNTs) and graphene nanoplatelets (GNPs)) at different concentrations have been prepared. Their dielectric properties (dielectric permittivity, dielectric loss) have been studied in the 1-12 GHz frequency range. Some factors (electromagnetic field frequency, fillers concentration, fillers intrinsic structure) influencing the dielectric behavior of the composites have been investigated. The dielectric properties of the developed natural rubber composites containing conductive fillers (fullerenes, CNTs, GNPs) indicate that these composites can be used as broadband microwave absorbing materials.

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“…Lately the research works appear about a possible applications of nanocomposites based on elastomeric matrices and carbon nanotubes as filler in microwave absorbers for deciding of electro magnetic interference (EMI) and electromagnetic co mpatibility (EM C) problems [12][13][14][15][16][17][18][19][20][21]. The polymer matrices used in these cases are usually epoxy resin, acrylonitrile-butadiene rubber, styrene-butadiene rubber, silicone rubber, polyurethane rubber.…”

Section: Introductionmentioning

confidence: 99%

Dielectric and Microwave Properties of Graphene Nanoplatelets /Carbon Black Filled Natural Rubber Composites

Al‐Hartomy¹,

Al‐Ghamdi²,

Al-Salamy³

et al. 2012

IJMC

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Natural rubber (NR) based nanocomposites containing a constant amount (50 phr) of standard furnace carbon black and graphene nanoplatelets (GNP) in concentrations from 1 to 5 phr have been prepared. Their dielectric (d ielectric permittiv ity, dielectric loss) and microwave propert ies (coefficients of absorption and reflect ion of the electro magnetic waves and electromagnetic interference shielding effectiveness) have been investigated in the 1-12 GHz frequency range. The results achieved allow us to reco mmend GNP as second filler for natural rubber based composites to afford specific absorbing properties.

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Microwave Dielectric Properties of Carbon Nanotube Composites

Cited by 11 publications

References 37 publications

Characterization of microwave absorption in carbon nanotubes using resonance aperture transmission method

Characterization of microwave absorption in carbon nanotubes using resonance aperture transmission method

Some Factors Influencing the Dielectric Properties of Natural Rubber Composites Containing Different Carbon Nanostructures

Dielectric and Microwave Properties of Graphene Nanoplatelets /Carbon Black Filled Natural Rubber Composites

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