Tannin-Based Carbon Foams for Electromagnetic Applications
作者： M. Letellier , J. Macutkevic , A. Paddubskaya , A. Plyushch , P. Kuzhir
DOI: 10.1109/TEMC.2015.2430370
关键词: Permittivity 、 Electronic engineering 、 Dielectric 、 Electrical resistivity and conductivity 、 Composite material 、 Conductivity 、 Carbon 、 Opacity 、 Electromagnetic shielding 、 Materials science 、 Microwave
摘要: Broadband dielectric analysis of tannin-based carbon foams produced at nine different densities, ranging from 0.036 to 0.114 g/cm3, was carried out in wide frequency (20 Hz–35 GHz) and temperature (25–500 K) ranges. Both constant electrical conductivity quasi-static regime, 129 Hz, were high (more than 106 close 70 S/m, respectively), increased with density according power laws. Significant electromagnetic interference shielding efficiency (EMI SE) found microwave (MW) frequencies for all samples. The highest value attenuation the level 20 dB 2-mm thick sample observed foam having lowest mean cell size. For thicker samples (4 mm 1 cm), EMI SE reached 39 73 dB, respectively. On cooling, dc decreased Mott's law but still remained opaque MW radiation. performances reported here, along other valuable properties such as “green” origin, low price, lightness, chemical inertness, thermal stability conductivity, open new routes producing effective shields carbonaceous porous structures.
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sci-hub.se 参考文章(36)
Davy Pissoort, Filip Vanhee, Johan Catrysse, Christian Brull, Tom Grenson, The importance of continuous and homogeneous gasket conductivity up to 40 GHz international symposium on electromagnetic compatibility. pp. 536- 540 ,(2013)
Lorna J. Gibson, Michael F. Ashby, Cellular Solids: Structure and Properties ,(1988)
Pierre Delhaes, Carbon-based Solids and Materials ,(2011)
D. Deptuck, J. P. Harrison, P. Zawadzki, Measurement of elasticity and conductivity of a three-dimensional percolation system. Physical Review Letters. ,vol. 54, pp. 913- 916 ,(1985) , 10.1103/PHYSREVLETT.54.913
Boris I. Shklovskii, Alex L. Efros, Electronic properties of doped semiconductors ,(1984)
J Adler, Conductivity exponents from the analysis of series expansions for random resistor networks Journal of Physics A. ,vol. 18, pp. 307- 314 ,(1985) , 10.1088/0305-4470/18/2/020
Emmanuel Decrossas, Mahmoud A. EL Sabbagh, Victor Fouad Hanna, Samir M. El-Ghazaly, Rigorous Characterization of Carbon Nanotube Complex Permittivity Over a Broadband of RF Frequencies IEEE Transactions on Electromagnetic Compatibility. ,vol. 54, pp. 81- 87 ,(2012) , 10.1109/TEMC.2011.2174788
F. Moglie, D. Micheli, S. Laurenzi, M. Marchetti, V. Mariani Primiani, Electromagnetic shielding performance of carbon foams Carbon. ,vol. 50, pp. 1972- 1980 ,(2012) , 10.1016/J.CARBON.2011.12.053
G. Tondi, V. Fierro, A. Pizzi, A. Celzard, Tannin-based carbon foams Carbon. ,vol. 47, pp. 1480- 1492 ,(2009) , 10.1016/J.CARBON.2009.01.041
Sung Hoon Park, Paul Thielemann, Peter Asbeck, Prabhakar R. Bandaru, Enhanced dielectric constants and shielding effectiveness of, uniformly dispersed, functionalized carbon nanotube composites Applied Physics Letters. ,vol. 94, pp. 243111- ,(2009) , 10.1063/1.3156032