Electromagnetic and microwave absorption properties of coatings based on spherical and flaky carbonyl iron

  • Yunxing Pan
  • Guojia MaEmail author
  • Xing Liu
  • Chenghao Wang
  • Nan Li
  • Jinyan Wang
  • Xigao JianEmail author


Single-layer and double-layer polyurethane (PU) matrix coatings containing spherical carbonyl iron (SCI) and flaky carbonyl iron (FCI) were designed and prepared by using a simple and effective manufacturing method, and the thickness of the coatings was kept at 1.5 mm. The complex permittivity, complex permeability and absorption properties of the coatings were investigated in the frequency range of 2–18 GHz. The results indicate that all the single-layer and double-layer coatings exhibit excellent absorption properties and wide absorption bands. By optimizing the filler radio and coating structure, the optimal reflection loss (RL) value can reach − 35 dB at 8.6 GHz and make the widest absorption band reach 15.5 GHz (2.5–18.0 GHz) and 4.9 GHz (10.7–15.6 GHz) for RL < − 5 dB and RL < − 10 dB, respectively. The coatings of SCI/FCI/PU exhibit a broad effective absorption bandwidth, which can be effectively applied to radar signature reduction and electromagnetic interference suppression in military and civil fields.



This work was supported by the National Key Research and Development Program of China (No. 2017YFB0307600) and the National Science Foundation of China (Nos. 91860204; U1837205; U1663226).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.


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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.State Key Laboratory of Fine ChemicalsDalian University of TechnologyDalianChina
  2. 2.The Science and Technology on Power Beam Processes LaboratoryManufacturing Technology Institute, AVICBeijingChina

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