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Indexed by:期刊论文

Date of Publication:2017-08-01

Journal:DIAMOND AND RELATED MATERIALS

Included Journals:SCIE、EI、Scopus

Volume:77

Page Number:53-56

ISSN No.:0925-9635

Key Words:Carbon nanocoils; Tissue; Microwave absorption property

Abstract:An economic electromagnetic wave absorber with carbon nanocoils (CNCs)/tissue and paraffin has been successfully synthesized and exhibits excellent microwave absorption property. The CNCs/tissue composite was obtained by growing spring-like CNCs on the tissue substrate with Fe-2(SO4)(3)/SnCl2 catalyst in a chemical vapor deposition method. It is found that the absorbers containing 10 wt% and 20 wt% CNCs/tissue show strong microwave absorption in a frequency range of 2-18 GHz. For the composite with 10 wt% CNCs/tissue, the maximum reflection loss (RL) of -46.36 dB at 14.72 GHz and the bandwidths of 7.44 and 5.68 GHz respectively corresponding to RL below -10 and -20 dB can be obtained. In addition, the composite with 20 wt% CNCs/tissue can also gain broad bandwidth corresponding to reflection loss below -10 dB, which is as high as 7.52 GHz. It is revealed that the composite with 10 wt% CNCs/tissue owns suitable real part of permittivity, which helps to obtain better impedance match and lower reflection coefficient to enhance the absorption of electromagnetic wave.