期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 799, 期 -, 页码 216-223出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.05.336
关键词
Nanostructure design; Fe/Fe2O3 hybrid; Electromagnetic conversion; Multi-reflection
资金
- Natural Science Foundation of Shandong Province [ZR2019YQ24]
- National Natural Science Foundation of China [51407134, 51603108, 51801001]
- China Postdoctoral Science Foundation [2016M590619, 2016M601878, 2018T110944]
- Key Project of Baoji University of Arts and Sciences [ZK2018051]
- Baoji Science and Technology Project [16RKX1-29]
- Baoji Engineering Technology Research Center for Ultrafast Optics and New Materials [2015CXNL-1-3]
- Thousand Talents Plan for Young Professionals of Shaanxi Province
- Thousand Talents Plan
- World-Class University and Discipline
- Taishan Scholar's Advantageous and Distinctive Discipline Program of Shandong Province
- World-Class Discipline Program of Shandong Province
Rational design on microstructure of magnetic material provides new opportunity to enhance the electromagnetic absorption performance. Herein, we demonstrate the successful preparation of spindle-cone of Fe/Fe2O3 and Fe2O3 samples with an average size of similar to 1.2 mu m, using a facile two-steps method. The well-defined spindle-cone shaped alpha-Fe2O3 was developed first by a solvothermal route and then reduced by H-2 or NaBH4, respectively. The morphologies, phase compositions and magnetization of these as-prepared samples are analyzed by Field-emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD) and X-ray photoelectron spectrum (XPS) and vibrating sample magnetometer (VSM). Meanwhile, the electromagnetic (EM) absorption performance of Fe/Fe2O3 and Fe2O3 spindle-conesparaffin composites with various filling ratios are also studied. The results reveal that Fe/Fe2O3 with a filling ratio of 50 wt% achieves the smallest reflection loss value of -26.2 dB at a thickness of 1.4 mm. At thinner thickness (1.0 mm), the bandwidth (RL < -10 dB) equals to 4.5 GHz (13.5-18 GHz). The excellent absorption mechanism was discussed in this work, which attributed to the unique nanostructure and moderate impedance matching and EM loss ability. (C) 2019 Elsevier B.V. All rights reserved.
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