Hierarchical carbon fiber reinforced SiC/C aerogels with efficient electromagnetic wave absorption properties

被引：68
作者：
Dai, Ding [1 ]
Lan, Xiaolin [1 ]
Wang, Zhijiang [1 ,2 ,3 ]
机构：
[1] Harbin Inst Technol, Sch Chem & Chem Engn, MIIT Key Lab Crit Mat Technol New Energy Convers &, Harbin 150001, Peoples R China
[2] Harbin Inst Technol, State Key Lab Urban Water Resource & Environm, Harbin 150001, Peoples R China
[3] Inner Mongolia Haite Huacai Technol Co Ltd, Management Comm Off Bldg,Jinqiao Econ & Technol De, Hohhot 010000, Peoples R China
来源：
COMPOSITES PART B-ENGINEERING | 2023年 / 248卷
基金：
中国国家自然科学基金;
关键词：
SiC; Carbon fiber; Aerogel; Porous structure; Electromagnetic wave absorption; MICROWAVE-ABSORPTION; BROAD-BAND; CONDUCTIVE NETWORK; GRAPHENE; COMPOSITE; PERFORMANCE; ULTRALIGHT; RGO; CONSTRUCTION; NANOCRYSTALS;
D O I：
10.1016/j.compositesb.2022.110376
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Rational microstructure design is confirmed to be a practical strategy for achieving high-performance electro-magnetic (EM) wave absorbers. Herein, hierarchical carbon fiber reinforced SiC/C (CF-SC) aerogel is prepared via a simple method, in which carbon fibers are incorporated into the hydrogel using a free radical polymeri-zation reaction to form a three-dimensional (3D) framework, and SiC is introduced through a carbothermal reduction reaction. Remarkably, the lightweight CF-SC aerogel achieves exceptional absorption performance compared to all reported carbon-and ceramic-based materials, with a reflection loss (RL) of-52.6 dB and an effective absorption bandwidth (EAB) of 8.6 GHz covering the entire Ku-band at the thickness of 3.2 mm. The experimental and theoretical calculations demonstrate that the outstanding absorption performance benefits from the perfect impedance matching and strong attenuation capability formed by interconnected 3D conductive networks and extensive heterogeneous interfaces. This study is of great significance in guiding the design and mechanism investigation of high-performance EM wave absorbers.
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页数：10
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