Biomass-derived carbon and polypyrrole addition on SiC whiskers for enhancement of electromagnetic wave absorption

Dong, Shun; Zhang, Xinghong; Hu, Peitao; Zhang, Wenzheng; Han, Jiecai; Hu, Ping

doi:10.1016/j.cej.2018.11.101

Cited by 90 publications

(23 citation statements)

References 54 publications

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“…However, the inferior impedance match of the carbon‐based materials hinders their wide applications. Previous advanced works combined carbon‐based materials with dielectric lossy fillers, such as SiC [ 37–39 ] ZnO, [ 12 ] and other dielectric lossy material, [ 40 ] to fabricate composites.…”

Section: Introductionmentioning

confidence: 99%

Preparation of SiC Nanowire/Carbon Fiber Composites with Enhanced Electromagnetic Wave Absorption Performance

Qian

Cai

et al. 2021

Adv Eng Mater

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Herein, the SiC‐coated carbon fiber decorated with SiC nanowire (SiCnw/CF) composites are successfully prepared by one‐step chemical vapor infiltration (CVI) process. Microstructures, the formation mechanism of SiCnws, thermal stability performance, and electromagnetic wave (EMW) absorption performance of the composites are investigated in detail. In particularly, benefiting the dielectric loss and conductive loss, the SiCnw/CF composites obtained at 1500 °C exhibit superior EMW absorption property with the minimum reflection loss (RL) of −36.5 dB with the effective absorption band of 5.5 GHz at a thickness of 1.88 mm. This work provides a simple way to obtain and design the CF‐based materials with good microwave absorption.

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Section: Introductionmentioning

confidence: 99%

Preparation of SiC Nanowire/Carbon Fiber Composites with Enhanced Electromagnetic Wave Absorption Performance

Qian

Cai

et al. 2021

Adv Eng Mater

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“…Then, multiple dielectric loss peaks are observed in high-frequency region (f > 6.5 GHz), revealing polarization relaxation behavior. In such a frequency region (f > GHz), polarization forms primarily included are interfacial and dipole polarization, according to recent discussions on mechanism [41,42]. In general, either dipole or interfacial polarization relaxation effect can be revealed by the Cole-Cole semicircle.…”

Section: Resultsmentioning

confidence: 99%

An Easy Method of Synthesis CoxOy@C Composite with Enhanced Microwave Absorption Performance

Bao

Chen

2020

Nanomaterials

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Design of interface-controllable magnetic composite towards the wideband microwave absorber is greatly significance, however, it still remains challenging. Herein, we designed a spherical-like hybrids, using the Co3O4 and amorphous carbon as the core and shell, respectively. Then, the existed Co3O4 core could be totally reduced by the carbon shell, thus in CoxOy core (composed by Co and Co3O4). Of particular note, the ratios of Co and Co3O4 can be linearly tuned, suggesting the controlled interfaces, which greatly influences the interface loss behavior and electromagnetic absorption performance. The results revealed that the minimum reflection loss value (RLmin) of −39.4 dB could be achieved for the optimal CoxOy@C sample under a thin thickness of 1.4 mm. More importantly, the frequency region with RL < −10 dB was estimated to be 4.3 GHz, ranging from 13.7 to 18.0 GHz. The superior wideband microwave absorption performance was primarily attributed to the multiple interfacial polarization and matched impedance matching ability.

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“…As shown in Figure 4a, ε′ decreases with the increase of frequency, this is mainly be ascribed to that with the electric field change at high frequency the lagging behind of the polarization response will increase, which is called frequency dispersion behavior. [ 25,26 ] The ε′ of samples BHPC‐8 and BHPC‐9 fluctuated around 16, and its high ε′ value indicates high energy storage capacity. However, high ε′ will lead to strong reflection of the material, so its absorption of EM wave is poor.…”

Section: Resultsmentioning

confidence: 99%

Biomass‐Derived Crocodile Skin‐Like Porous Carbon for High‐Performance Microwave Absorption

Cheng

Meng

et al. 2022

Advanced Sustainable Systems

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Biomass‐derived porous carbon materials have received extensive attention in electromagnetic wave absorbing (EMA) materials due to their stability, lightweight, and friendliness. Adjusting the morphology of porous carbon materials is an effective way to improve their absorbing properties. In this work, the crocodile skin‐like biomass hierarchical porous carbon (BHPC) material was synthesized from waste rice husk via a carbonization and alkali activation process. The effect of the consistency of the activator on the porous morphology is investigated. Under ultra‐low filler content of 10 wt%, the minimum reflection loss (RLmin) of the BHPC‐10 composite material reaches −47.46 dB, and the effective absorption bandwidth (EAB) is up to 3.40 GHz in the X‐band at a thickness of 2.8 mm. This work provides a reference for preparing porous carbon materials derived from pure biomass and a feasible scheme for designing high‐performance microwave absorbing materials.

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Biomass-derived carbon and polypyrrole addition on SiC whiskers for enhancement of electromagnetic wave absorption

Cited by 90 publications

References 54 publications

Preparation of SiC Nanowire/Carbon Fiber Composites with Enhanced Electromagnetic Wave Absorption Performance

Preparation of SiC Nanowire/Carbon Fiber Composites with Enhanced Electromagnetic Wave Absorption Performance

An Easy Method of Synthesis CoxOy@C Composite with Enhanced Microwave Absorption Performance

Biomass‐Derived Crocodile Skin‐Like Porous Carbon for High‐Performance Microwave Absorption

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