Journal
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
Volume 193, Issue -, Pages 153-159Publisher
ELSEVIER
DOI: 10.1016/j.mseb.2014.12.008
Keywords
Microwave absorption; SWCNTs; CoFe2O4; Nanocomposite
Funding
- National Key Basic Research Program of China [2015CB921600]
- National Natural Science Foundation of China [51202137, 61240054, 11274222]
- QiMingXing Project of the Shanghai Municipal Science and Technology Commission [14QA1402000]
- Shanghai Municipal Education Commission [SDCX2012027]
- Shanghai University Innovation Fund [SDCX2012027]
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Single-walled carbon nanotubes were facilely and abundantly synthesized by low-pressure air arc discharge method (LPA-SWCNTs), and CoFe2O4 nanocrystals were synthesized by a nitrate citric acid sol-gel auto-ignition method. The electromagnetic and microwave absorption properties of LPA-SWCNTs, CoFe2O4 nanocrystals and their nanocomposites were investigated. The LPA-SWCNT/CoFe2O4 nanocomposites showed excellent microwave absorption properties. The minimum efficient reflection loss is -30.7 dB at 12.9 GHz for 10 wt% of LPA-SWCNTs in the nanocomposites, and an effective absorption bandwidth with a reflection loss below -10 dB is 7.2 GHz. The Debye equation and impedance matching were introduced to explain the microwave absorption properties. Compared with the single-component materials, the LPA-SWCNT/CoFe2O4 nanocomposites are an excellent candidate for microwave absorbers. (C) 2014 Elsevier B.V. All rights reserved.
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