Journal
JOURNAL OF MATERIALS RESEARCH
Volume 26, Issue 21, Pages 2683-2690Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1557/jmr.2011.317
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Funding
- National Nature Science Foundation of China [21071125, 21101140]
- Natural Science Foundation of Zhejiang Province [Y4080417, 4110025]
- Science and Technology Key Project of Zhejiang Province [2010C11053]
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Expanded graphite/cobalt ferrite/polyaniline (EG/CF/PANI) ternary composites were obtained by a two-step process. The intercalation compound, CF embedded in EG, was synthesized by a coprecipitation method. PANI could then be coated on the surface of the EG/CF microparticles by in-situ polymerization to form ternary composites of EG/CF/PANI. The results indicate that the electrical and magnetic performance of EG/CF and EG/CF/PANI composites are related to their composition. The EG/CF composite with mass ratio of 1.0 has the maximal conductivity (833.33 S.cm(-1)) among the binary composites. Saturation magnetizations (M-s) of the EG/CF composite with m(EG)/m(CF) of 0.8 is the largest among EG/CF composites, the ternary composites of EG/CF/PANI were prepared from the EG/CF composite at this mass ratio. The electromagnetic wave absorbing property of all ternary composites excelled those of EG/CF composites, and the sample with 40 wt% of PANI has the best absorption properties in the range of 8-18 GHz frequency.
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