Affiliation of Author(s):材料科学与技术学院
Journal:JOURNAL OF COLLOID AND INTERFACE SCIENCE
Key Words:Interface Heterostructure C/Fe3C composites Honeycomb-like Light-weight
Abstract:Design of dielectric/magnetic heterostructure and multiple interfaces is a challenge for the microwave absorption. Thus, in this study, a novel C/Fe3C nanocomposites have been fabricated by annealing the precursors obtained by the facile chemical blowing of polyvinyl pyrrolidone (PVP) and Fe(NO3)(3).9H(2)O. By changing the content of Fe(NO3)(3).9H(2)O, the honeycomb -like structure with scads of pores and electromagnetic parameters could be successfully tailored. When the addition of Fe(NO3)(3).9H(2)O is ranging from 1 to 2 g, honeycomb-structured nanocomposites possess high performance microwave absorption when mixed with 90 wt% paraffin. The minimal reflection loss is -37.4 dB at 13.6 GHz and effective bandwidth can reach to 5.6 GHz when the thickness is 2.0 mm, indicating its great potential in microwave absorbing field. Its outstanding microwave performance is tightly related to the porous structure and substantial interface such as carbon/air and carbon/Fe3C, which are in favor of the impedance matching and interfacial polarization. Thus, our study may provide a good reference for the facile synthesis of light-weight carbon-based nanocomposites with effective interfacial polarization. (C) 2017 Elsevier Inc. All rights reserved.
ISSN No.:0021-9797
Translation or Not:no
Date of Publication:2017-12-15
Co-author:张亚男,刘伟,lw,权斌,马建娜,李道冉,孟卫
Correspondence Author:jiguangbin