Abstract

Self-assembly of flakes to form three-dimensional flower-like structure is an effective way to strengthen electromagnetic absorption capability. However, it still remains a great challenge to synthesis of such structure, especially the preparation of flower-like Fe particles. In this paper, hierarchical flower-like α-Fe particles with a diameter of ∼3 μm are prepared by combining a simple in situ reduction method and assisted with an appropriate external magnetic field at normal atmosphere. A possible mechanism for the formation of flower-like structure related to the synergy of magnetic field and hydrogen bubble which generated by in-situ reduction reaction is proposed. The electromagnetic properties of flower-like α-Fe-paraffin composites were measured with the coaxial reflection/transmission technique at 2–18 GHz. The minimal reflection loss value of −33.1 dB is obtained at 17.46 GHz. Moreover, the effective absorption bandwidth with reflection loss exceeding −10 dB is up to 6.2 GHz (7.7–13.9 GHz) at a thickness of 3 mm, which covers whole of the X-band (8–12 GHz) and part of the Ku-band (12–18 GHz). These excellent absorbing performances suggesting that the flower-like α-Fe particles synthesized here could be an extremely promising electromagnetic absorbing material.

Full Text
Paper version not known

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.