Influence of Structural Features and Physico-chemical Properties of Metal-carbon Nanocomposites with Ferromagnetic Metal Inclusions on Microwave Radiation
Electronic Archive of Sumy State University
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
Influence of Structural Features and Physico-chemical Properties of Metal-carbon Nanocomposites with Ferromagnetic Metal Inclusions on Microwave Radiation
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| Creator |
Kozhitov, L.
Kuzmenko, A. Muratov, D. Rodionov, V. Popkova, A. Yakushko, E. Dobromyslov, M. |
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| Subject |
Polyacrylonitrile
IR-heating Metal-carbon nanocomposites Nanoparticles of metals Carbon nanotubes Ferromagnetic nanoparticles Radiation-absorbing materials Transmission coefficient Reflection coefficient |
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| Description |
Metal-carbon nanocomposites on the basis of polyacrylonitrile and compounds of metals (Fe, Ni, Co) synthesized at IR-heating and studied by SEM, X-ray phase analysis, Raman scattering, IR Fourier spec-troscopy are characterized by the carbon nanostructured amorphous graphite matrix with uniformly dis-tributed nanoparticles of metals (10-30 nm), their oxides and compounds – FeNi3 and FeCo, multilayered carbon nanotubes (~ 7-22 nm), and in the composition of Fe-Co / C fullerene-like formations – C60. All nanocomposites feature high absorption of electromagnetic waves in the frequency range 20-40 GHz. Two absorption mechanisms are proposed: dielectric loss in the amorphous carbon matrix and scattering of electric and magnetic components by ferromagnetic inclusions. Absorption was – 8.68 dB for Fe-Ni / C, – 12.93 dB for Fe / C, and – 7.07 dB for Ni / C and for Fe-Co / C was found to be maximum in the whole range studied (more than – 40 dB) with a peak of – 52.83 dB at 24.27 GHz, which is explained probably by both high nanocomposite electric conductivity 2 S / m and high specific magnetization of phase FeCo. |
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| Publisher |
Sumy State University
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| Date |
2014-07-30T11:14:49Z
2014-07-30T11:14:49Z 2014 |
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| Type |
Article
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| Identifier |
L. Kozhitov, A. Kuzmenko, D. Muratov, et al., J. Nano- Electron. Phys. 6 No 3, 03024 (2014)
http://essuir.sumdu.edu.ua/handle/123456789/36259 |
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| Language |
en
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