FeOx Nanoparticle/Coal Gasification Fine Slag Hybrids for Electromagnetic Wave Absorbers

被引：11
作者：
Gao, Shengtao [1 ,2 ]
Chen, Longwei [1 ]
Zhang, Yuanchun [3 ]
Bai, Yonghui [4 ]
Wei, Xinyu [1 ,2 ]
Shan, Jiafang [1 ]
机构：
[1] Chinese Acad Sci, Hefei Inst Phys Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
[2] Univ Sci & Technol China, Hefei 230026, Peoples R China
[3] Anhui Univ Sci & Technol, Huainan 232001, Peoples R China
[4] State Key Lab High Efficiency Utilizat Coal & Gre, Yinchuan 750021, Ningxia, Peoples R China
来源：
ACS APPLIED NANO MATERIALS | 2022年 / 5卷 / 06期
基金：
中国国家自然科学基金;
关键词：
magnetic materials; microstructure; coal gasification fine slag; microwave absorption; nanoparticle; MICROWAVE-ABSORPTION ENHANCEMENT; CUBE-LIKE ZNSNO3; CARBON-NANOTUBE; COMPOSITES; TEMPERATURE; FABRICATION; NANOCOMPOSITES; PERMITTIVITY; MICROSPHERES; NANOFIBERS;
D O I：
10.1021/acsanm.2c00781
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Electromagnetic-wave (EMW) absorbers with strong reflection loss (RL) and a wide absorption frequency band under extremely thin thicknesses are highly desirable. Heterostructured multi-interface Fe3O4/FeO/Fe (FeOx) nanoparticle/coal gasification fine slag (CGFS) hybrids were successfully synthesized by coating highly graphitized CGFS with FeOx nanoparticles. The crystal structure, morphology, composition, magnetic performance, and electromagnetic (EM) parameters of FeOx/CGFS hybrids were tested using modern analysis and testing technology. Given their heterostructured multi-interface structural design, appropriate impedance matching, and synergy of dielectric and magnetic losses, the as-prepared FeOx/CGFS hybrids show adjustable and outstanding EMW absorption performances. The minimal RL (RLmin) of FeQ/CGFS hybrids is -61.6 dB at a thickness of 1.8 mm, and the widest effective absorption bandwidth (RL <= -10.0 dB) can cover 5.0 GHz (13.0-18.0 GHz) with a thickness of 1.7 mm. Furthermore, the results of the radar cross-section (RCS) simulation testify that FeOx/CGFS hybrids can effectively reduce EMW scattering in the X band by varying the thicknesses of the FeOx/CGFS hybrid coatings. These heterostructured multi-interface magnetic carbon-based EMW absorbers with high-performance EMW absorption and good reduction ability of the RCS can promote the resource utilization of CGFS.
引用
收藏
页码：7767 / 7777
页数：11
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