期刊
COMPOSITES SCIENCE AND TECHNOLOGY
卷 72, 期 13, 页码 1632-1636出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2012.06.022
关键词
Electrical properties
资金
- National Natural Science Foundation of China [51001070]
- Shanghai Science and Technology Committee [10JC1407600]
- 973 National Project [2011CB922202]
Porous graphitic carbons encapsulating Fe nanoparticles (PGCFs) were fabricated by infiltrating activated carbon (AC) with an iron salt and thereafter heat-treating the products in vacuum, and the electromagnetic parameters of the PGCF were investigated over 2-18 GHz frequency. The results demonstrated that the formation of porous graphitic network encapsulating Fe nanoparticles endowed the composite a very high permittivity and dielectric loss at 2-18 GHz. Return loss (RL) for the PGCF-based absorbers were investigated based on the measured electromagnetic parameters. A typical dual-layer absorber exhibited an excellent microwave absorption with a 43 dB maximum absorption at 10 GHz and a nearly 7 GHz bandwidth for RL < -20 dB. (C) 2012 Elsevier Ltd. All rights reserved.
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