期刊
RSC ADVANCES
卷 2, 期 15, 页码 6216-6221出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2ra20081c
关键词
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资金
- National Basic Research Program of China [2010CB934700]
- National Natural Science Foundation of China [91022032, 51102223, 21061160492, J1030412]
- Chinese Academy of Sciences [KJZD-EW-M01-1]
- International Science & Technology Cooperation Program of China [2010DFA41170]
- National Science Foundation
A new kind of beta-MnO2 nanorod (NR)-poly(vinylidene fluoride) (PVDF) functional composite with a high dielectric constant can be prepared by addition of beta-MnO2 NRs to PVDF. The microwave absorption properties of beta-MnO2 NRs, which were synthesized by a simple hydrothermal method on a large scale at low temperature, have been investigated for their applications in dielectric composites. It is found that the absorbers filled with beta-MnO2 NRs possess excellent microwave absorption properties, and the minimum reflection loss (RL) can be adjusted to different frequencies in the range 4-14 GHz by controlling the thickness of the beta-MnO2 NR-PVDF composite. The composite has a significantly high dielectric constant and good thermal stability, with quite a low percolation threshold. The dielectric constant can reach as high as 862 when the concentration of beta-MnO2 nanorod filler reaches 7 vol% at 10(2) Hz.
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