کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5458620 | 1516173 | 2017 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis and microwave absorption properties of hierarchical Fe micro-sphere assembly by nano-plates
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
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چکیده انگلیسی
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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 721, 15 October 2017, Pages 449-455
Journal: Journal of Alloys and Compounds - Volume 721, 15 October 2017, Pages 449-455
نویسندگان
Pingan Yang, Miao Yu, Jie Fu, Lirui Wang,