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Electromagnetic absorbing materials using nonwoven fabrics coated with multi-walled carbon nanotubes
| Title: | Electromagnetic absorbing materials using nonwoven fabrics coated with multi-walled carbon nanotubes |
| Authors: | Sano, Eiichi Browse this author →KAKEN DB | | Akiba, Eiji Browse this author |
| Issue Date: | Nov-2014 |
| Publisher: | Elsevier |
| Journal Title: | Carbon |
| Volume: | 78 |
| Start Page: | 463 |
| End Page: | 468 |
| Publisher DOI: | 10.1016/j.carbon.2014.07.027 |
| Abstract: | We calculated the complex permittivity of materials required to achieve a single-layer electromagnetic absorber with a high absorption coefficient in the 60-GHz band. The calculation results indicated that an absorption coefficient of 0.95 can be achieved, for a 5-mm sheet when the real part of the relative permittivity epsilon' is close to that of the free space and the conductivity sigma is around 3 S/m. On the basis of the findings, we developed three types of nonwoven fabrics with high porosity in which the fibers were coated with multiwalled carbon nanotubes (MWCNTs). The epsilon' of 1.12-1.32 and a of 0.107-12.4 S/m were obtained depending on the porosity of the fabrics. The measured absorption coefficients reached 0.97 at 60 GHz in agreement with the calculations. The present MWCNTs-coated nonwoven fabrics will be useful materials for high performance electromagnetic absorbers. (C) 2014 Elsevier Ltd. All rights reserved. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/57441 |
| Appears in Collections: | 量子集積エレクトロニクス研究センター (Research Center for Integrated Quantum Electronics) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 佐野 栄一
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