Chin. Phys. B ›› 2013, Vol. 22 ›› Issue (4): 44101-044101.doi: 10.1088/1674-1056/22/4/044101

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Enhanced absorption property of ordered mesoporous carbon/Co-doped ordered mesoporous carbon double-layer absorber

郭绍丽, 王六定, 王一明, 吴宏景, 沈中元   

  1. School of Science, Northwestern Polytechnical University, Xi'an 710072, China
  • 收稿日期:2012-07-09 修回日期:2012-11-28 出版日期:2013-03-01 发布日期:2013-03-01
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 50771082 and 60776822), the Doctorate Foundation (Grant No. CX201207) and the Graduate Starting Seed Fund of Northwestern Polytechnical University (Grant No. Z2011011), the Natural Science Foundation of Shaanxi Province, China (Grant No. 2012JM1009), and the Scientific Research Program Funded by Shaanxi Provincial Educational Department, China (Grant No. 12JK0984).

Enhanced absorption property of ordered mesoporous carbon/Co-doped ordered mesoporous carbon double-layer absorber

Guo Shao-Li (郭绍丽), Wang Liu-Ding (王六定), Wang Yi-Ming (王一明), Wu Hong-Jing (吴宏景), Shen Zhong-Yuan (沈中元)   

  1. School of Science, Northwestern Polytechnical University, Xi'an 710072, China
  • Received:2012-07-09 Revised:2012-11-28 Online:2013-03-01 Published:2013-03-01
  • Contact: Wang Liu-Ding E-mail:wangld@nwpu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 50771082 and 60776822), the Doctorate Foundation (Grant No. CX201207) and the Graduate Starting Seed Fund of Northwestern Polytechnical University (Grant No. Z2011011), the Natural Science Foundation of Shaanxi Province, China (Grant No. 2012JM1009), and the Scientific Research Program Funded by Shaanxi Provincial Educational Department, China (Grant No. 12JK0984).

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摘要： Ordered mesoporous carbon (OMC) and metal-doped (M-doped) OMC composites are prepared and their electromagnetic (EM) parameters are measured. Using the measured EM parameters we calculate the EM wave absorption properties of double-layer absorber which is composed of OMC as an absorbing layer and M-doped OMC for matching layer. The calculated results show that the EM wave absorption performance of OMC/OMC-Co (2.2 mm/2.1 mm) is improved remarkably. The obtained effective absorption bandwidth is up to 10.3 GHz and the minimum reflection loss reaches -47.6 dB at 14.3 GHz. The enhanced absorption property of OMC/OMC-Co can be attributed to the impedance match between air and absorber. Moreover, it can be found that for the absorber with given matching layer, larger value of Δ tanδε (=tan δε absorbing -tan δε matching) can induce better absorption performance, indicating the impedance difference between absorbing layer and matching layer plays an important role in improving the absorption property of double-layer absorber.

关键词: ordered mesoporous carbon, electromagnetic wave absorption, double-layer absorber

Abstract: Ordered mesoporous carbon (OMC) and metal-doped (M-doped) OMC composites are prepared and their electromagnetic (EM) parameters are measured. Using the measured EM parameters we calculate the EM wave absorption properties of double-layer absorber which is composed of OMC as an absorbing layer and M-doped OMC for matching layer. The calculated results show that the EM wave absorption performance of OMC/OMC-Co (2.2 mm/2.1 mm) is improved remarkably. The obtained effective absorption bandwidth is up to 10.3 GHz and the minimum reflection loss reaches -47.6 dB at 14.3 GHz. The enhanced absorption property of OMC/OMC-Co can be attributed to the impedance match between air and absorber. Moreover, it can be found that for the absorber with given matching layer, larger value of Δ tanδε (=tan δε absorbing -tan δε matching) can induce better absorption performance, indicating the impedance difference between absorbing layer and matching layer plays an important role in improving the absorption property of double-layer absorber.

Key words: ordered mesoporous carbon, electromagnetic wave absorption, double-layer absorber

中图分类号:  (Magnetostatics; magnetic shielding, magnetic induction, boundary-value problems)

  • 41.20.Gz
75.70.Cn (Magnetic properties of interfaces (multilayers, superlattices, heterostructures)) 77.22.Gm (Dielectric loss and relaxation)