Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5458620 | Journal of Alloys and Compounds | 2017 | 7 Pages |
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 â¼3 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 â33.1 dB is obtained at 17.46 GHz. Moreover, the effective absorption bandwidth with reflection loss exceeding â10 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.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Pingan Yang, Miao Yu, Jie Fu, Lirui Wang,