journal article·2018-08-24

Synthesis and Electromagnetic and Microwave Absorption Properties of Monodispersive Fe3O4/α-Fe2O3 Composites

Jindou Ji, Yue Huang, Jinhua Yin, Xiuchen Zhao, Xingwang Cheng, Shuli He, Xiang Li, Jun He, Jiping Liu

ACS Applied Nano Materials· Volume 1· Issue 8
Publisher page

Abstract

Fe3O4/α-Fe2O3 composites were synthesized by a one-step method. The composition and their performances were modified by adjusting the concentration of Fe3+ (FeCl3·6H2O) in the precursor solution, effectively. Compared with single-phase Fe3O4 and Fe2O3, the effective microwave absorbing ability of Fe3O4/α-Fe2O3 composites is much widened in the range 1–18 GHz, which could stem from the enhanced dipolar polarization and interfacial polarization due to lattice dislocations at the interface of Fe3O4/α-Fe2O3. The minimum reflection loss (RL) of Fe3O4/α-Fe2O3 composites reaches about −43.1 dB at a thickness of 2.0 mm, with the effective absorption band reaching 3.4 GHz (9.8–13.2 GHz). In the thickness of 1.5–3.2 mm, the width of the RL reaches 9.9 GHz (3.5–13.4 GHz). The results demonstrate that Fe3O4/α-Fe2O3 composites could be a candidate to be used as absorbers with the microwave absorption band much widened.
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Research context

OpenAlex topics: Electromagnetic wave absorption materials · Advanced Antenna and Metasurface Technologies · Metamaterials and Metasurfaces Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China

School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China

Department of Physics, Capital Normal University, Beijing 100048, China

Division of Functional Materials, Central Iron and Steel Research Institute, Beijing 100081, China

Funding

National Natural Science Foundation of China

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