Microwave Absorption Properties of Carbon （微波吸收性能的碳）.pdfVIP

Open Journal of Composite Materials, 2013, 3, 17-23 17 /10.4236/ojcm.2013.32003 Published Online April 2013 (/journal/ojcm) Microwave Absorption Properties of Carbon Nanotubes-Epoxy Composites in a Frequency Range of 2 - 20 GHz Zhou Wang, Guang-Lin Zhao Department of Physics, Southern University and A M College, Baton Rouge, Louisiana, USA. Email: Guang-lin_zhao@ Received March 1st, 2013; revised March 30th, 2013; accepted April 10th, 2013 Copyright © 2013 Zhou Wang, Guang-Lin Zhao. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. ABSTRACT In this work, multi-walled carbon nanotubes (MWCNTs)-epoxy composites with MWCNTs (outer diameter less 8 nm) loadings from 1 to 10 wt% were fabricated. The microstructures, dielectric constant, and microwave absorption proper- ties of the MWCNTs-epoxy composite samples were investigated. The measurement results showed that the micro- wave absorption ratio of the MWCNTs-epoxy composite strongly depend on the MWCNT loading in the composites. The microwave absorption ratio up to 20% - 26% around 18 - 20 GHz was reached for the samples with 8 - 10 wt% MWCNT loadings. The high absorption performance is mainly attributed to the microwave absorption of MWCNTs and the dielectric loss of MWCNTs-epoxy composites. Keywords: Microwave Absorption; Multi-Walled Carbon Nanotubes; Epoxy Composites; Absorption Ratio; Dielectric Loss 1. Introduction oretic and experimental studies have demonstrated that the unique one dimensional hollow tube structures of Microwave absorbing