کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7992850 | 1516149 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Development of Fe/Fe3O4@C composite with excellent electromagnetic absorption performance
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this work, core-shell shaped Fe3O4@C composites have been firstly prepared by in-situ polymerization of phenolic resin on the surface of Fe3O4 and subsequent high-temperature carbonization. The core of Fe3O4 nanoparticles can be partial or totally reduced to metallic Fe in a N2/H2 atmosphere and resulted in Fe3O4-Fe@C and Fe@C products. These as-prepared Fe-Fe3O4@C and Fe@C products are analyzed by X-ray diffraction (XRD), and transmission electron microscopy (TEM). Furthermore, the electromagnetic microwave absorption properties of the core-shell nanocomposites are investigated in terms of the theory of transmission lines. Compared with pristine Fe3O4, Fe3O4@C and Fe@C, the Fe3O4-Fe@C ternary heterostructures exhibit the outstanding microwave absorption properties. The minimum reflection loss (RL) of â29.3â¯dB can be observed at the frequency of 12.6â¯GHz with the thickness of 3.9â¯mm. The bandwidth (RLâ¯â¤â¯â10â¯dB) can be monitored in the frequency of 3.6-18â¯GHz with the thickness of 1.5-4.0â¯mm. The excellent absorption is attributed to the synergistic effect of dielectric and magnetic loss, multiple interfacial polarization resonances, and good impedance match.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 745, 15 May 2018, Pages 547-554
Journal: Journal of Alloys and Compounds - Volume 745, 15 May 2018, Pages 547-554
نویسندگان
Ailing Feng, Zirui Jia, Yue Zhao, Hualiang Lv,