Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5347186 | Applied Surface Science | 2018 | 8 Pages |
Abstract
The combination of carbon materials with magnetic materials to fabricate new composites has attracted widespread attention due to their strong potential applications as microwave absorbing materials. Here, combining the excellent physical properties of carbon fibers (CFs) with the unique magnetic properties of FeCo-SiO2 nanogranular films, we report a new type of nano-micrometer composite, which is fabricated by a radio frequency magnetron sputtering method at low temperature and high vacuum. The microstructures, phase compositions, mechanical performances, and magnetic and microwave absorption properties of the composites were successfully characterized. After modification with FeCo-SiO2 nanogranular films, the CFs still maintained high strength. The CF/FeCo-SiO2 nanogranular film composites exhibited magnetic properties, where the maximum value of saturation magnetization reached 56 emu/g, and the minimum coercivity reached 95Â Oe. In particular, the CF/FeCo-SiO2 nanogranular film composites exhibited strong electromagnetic absorption properties in the range of 2-18Â GHz. The absorption bandwidth lower than â10Â dB was in the frequency range of 4.08-18Â GHz, and the reflection loss reached â43.78Â dB at 4.64Â GHz with a thickness of 5Â mm. The strategy utilized here for the preparation of functionalized CFs paves the way for the development of wave-absorption composites with excellent performances.
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Authors
Yongshan Wei, Jianling Yue, Xiu-Zhi Tang, Zuojuan Du, Xiaozhong Huang,