|
|||||
|
|
| Electromagnetism and Absorptivity of the Modified Micro-coiled Chiral Carbon Fibers | |
| 作者姓名： | Zheng Tianliang Wang Yuehong Zheng Kuangyu Li Qian Tao Ye |
| 作者单位： | [1]School of Materials Science and Engineering, Beo＇ing University of Aeronautics and Astronautics, Beijing 100083, China [2]School of Electronics and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China |
| 基金项目： | 国家高技术研究发展计划(863计划) |
| 摘 要： | Micro-coiled chiral carbon fibers are modified by nano-Ni. X-ray diffraction （XRD） and scanning electron microscopy （SEM） are used to compare the composition and morphology of the unmodified and the modified fibers. The results show that electromagnetism parameters of the modified are different from those of the unmodified. After modification by nano-Ni, the micro-coiled chiral carbon fibers have decreased permittivity and electrical loss. The permeability and magnetic loss of the modified carbon fibers become larger than those of the unmodified ones. Moreover, the modification of unmodified chiral carbon fibers into the modified is much like changing hollow electric windings into those with magnetic cores inside. The modifier intensifies the cross polarization of the chiral carbon fibers and makes the permittivity and the permeability get closer to each other which improves the matching performance and enhances absorbability of coatings. In the range of 6-18 GHz, the reflectivity of the coating is 6-8dB and the bandwidth is 12 GHz. The area density of the coating is below 3 kg/m^2. |
| 关 键 词： | 减震材料 碳纤维 电磁学 飞机 |
| 收稿时间： | 2007-01-25 |
| 修稿时间： | 2007-06-29 |
Electromagnetism and Absorptivity of the Modified Micro-coiled Chiral Carbon Fibers |
|
| Zheng Tianliang Wang Yuehong Zheng Kuangyu Li Qian Tao Ye.Electromagnetism and Absorptivity of the Modified Micro-coiled Chiral Carbon Fibers[J].Chinese Journal of Aeronautics,2007,20(6):559-563. | |
| Authors: | Zheng Wang Zheng Kuangyu Li Qian Tao Ye |
| Institution: | aSchool of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China bSchool of Electronics and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China |
| Abstract: | Micro-coiled chiral carbon fibers are modified by nano-Ni. X-ray diffraction (XRD) and scanning electron microscopy (SEM) are used to compare the composition and morphology of the unmodified and the modified fibers. The results show that electromagnetism parameters of the modified are different from those of the unmodified. After modification by nano-Ni, the micro-coiled chiral carbon fibers have decreased permittivity and electrical loss. The permeability and magnetic loss of the modified carbon fibers become larger than those of the unmodified ones. Moreover, the modification of unmodified chiral carbon fibers into the modified is much like changing hollow electric windings into those with magnetic cores inside. The modifier intensifies the cross polarization of the chiral carbon fibers and makes the permittivity and the permeability get closer to each other which improves the matching performance and enhances absorbability of coatings. In the range of 6-18 GHz, the reflectivity of the coating is 6-8dB and the bandwidth is 12 GHz. The area density of the coating is below 3 kg/m2. |
| Keywords: | absorbing coating micro-coiled chiral carbon fiber modify electromagnetism parameters |
| 本文献已被 CNKI 维普 万方数据 ScienceDirect 等数据库收录！ | |