Microwave absorbing performances of multiwalled carbon nanotube composites with negative permeability
- 9 July 2007
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 91 (2), 023119
- https://doi.org/10.1063/1.2755875
Abstract
The permittivity and permeability behaviors of composites made from the multiwalled carbon nanotubes with magnetic impurity Ni and the wax have been studied in 3 – 18 GHz . The unusual permittivitydispersion behaviors have been explained based on the Cole-Cole model and the conductivity contribution model. Permeability is found to have negative imaginary parts within 3 – 11 GHz . The composites are found to show good microwave absorbing performances (reflection loss < − 20 dB ): matching thickness is 1.5 mm and absorbing frequency band is 11.6 – 12.4 GHz , and the absorbing performance can be explained by the “geometrical effect.”Keywords
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