Article
Materials Science, Ceramics
Junjie Qian, Bin Du, Chao He, Mei Cai, Xinrong Zhong, Hao Xiong, Shenghui Zeng, Anze Shui
Summary: The hierarchical SiOC/SiCnws/CF composites showed excellent electromagnetic absorption performance at 14.4 GHz and have guidance for the application of carbon fiber/ceramics matrix composites in harsh environment.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Nanoscience & Nanotechnology
Kai Su, Yang Wang, Kexuan Hu, Xia Fang, Jie Yao, Quan Li, Jian Yang
Summary: An ultralight and high-strength SiCnw@SiC foam with highly efficient microwave absorption and heat insulation properties was successfully synthesized, featuring a novel double network structure. The introduction of SiCnw greatly enhances the microwave absorption capacity and thermal insulation performance of the foam, especially at high temperatures. This multifunctional material has potential applications in microwave absorption and high-temperature heat insulation in harsh environments.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Jun He, Yanwei Zhang, Kechao Zhou, Haitang Yang, Heng Luo, Yang Li
Summary: Increasing attention is being given to the regulation of electromagnetic parameters for high-performance electromagnetic wave absorbers through micromorphological design and proper composition. In this study, a unique hierarchical SiC nanowire-reinforced SiC aerogel decorated with Ni-capped carbon nanotubes (SiCnw@SiC-Ni@CNT) was constructed. The combination of multiphase magnetic/dielectric materials and specific 3D hierarchical microstructures resulted in significant improvement in multiple dielectric/magnetic losses, electromagnetic scattering effects, and impedance matching capabilities, leading to remarkable tunable microwave absorption performance.
RESULTS IN PHYSICS
(2023)
Article
Chemistry, Physical
Yuntian Fan, Dou Yang, Hui Mei, Shanshan Xiao, Yongtao Yao, Laifei Cheng, Litong Zhang
Summary: In this study, integration of enhanced mechanical and electromagnetic wave absorption performance was achieved in SiC fiber/Si3N4 composites by growing SiC nanowires on the interface. The introduction of SiC nanowires improved the bonding between the fiber and matrix, enhancing the mechanical properties and increasing the dielectric loss for efficient EMW absorption. The composite with 1.8 vol% SiC nanowires demonstrated optimal mechanical and EMW absorption properties, making it a potential lightweight and high-performance EMW absorbing material for aviation and aerospace.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Zhen Wang, Yicheng Hou, Haoquan Hao, Yong Shuai, Zhijiang Wang
Summary: Despite efforts, microwave contamination is increasing and difficult to address. SiC nanowire aerogels show promise as microwave absorbers due to their properties. However, conventional methods for preparing SiC nanowires are costly and require specific equipment and gases. This study presents a cost-effective method for synthesizing SiC@SiO2 nanocable aerogels using a low-cost carbon source, demonstrating a compressive-recovered property and wide effective absorption bandwidth for microwave absorption applications. This suggests that SiC nanofiber aerogels synthesized using this method have potential for next-generation microwave devices in extreme environments.
Article
Materials Science, Ceramics
Jinbu Su, Boli Wang, Xiaoyu Cao, Rui Yang, Heng Zhao, Pengkui Zhang, Weike Wang, Chengbing Wang
Summary: In this study, SiC nanowires were grown on the surface of carbon fiber by polymer impregnation and pyrolysis, and the SiC matrix was prepared by chemical vapor osmosis method. The introduction of SiC nanowires enhances the mechanical and microwave absorption properties of the composite, providing a new method for preparing lightweight, stable, and high-performance microwave absorption materials.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Zhen Wang, Hairui Zhao, Ding Dai, Haoquan Hao, Zhijiang Wang
Summary: Graphene oxide (GO) was used as a building block to prepare SiC aerogel precursors, which were successfully converted into ultra-low density SiC aerogel. The synthesized SiC aerogel showed a wide absorption band and a high absorption frequency-to-thickness correlation, providing a new approach for the practical applications of GO and SiC in EMA, supercapacitors, and sensors.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Multidisciplinary
Ding Dai, Xiaolin Lan, Zhijiang Wang
Summary: Rational microstructure design has led to the development of hierarchical carbon fiber reinforced SiC/C aerogels with exceptional electromagnetic wave absorption performance. The lightweight CF-SC aerogel exhibits perfect impedance matching and strong attenuation capability, resulting in a reflection loss of -52.6 dB and an effective absorption bandwidth of 8.6 GHz, covering the entire Ku-band at a thickness of 3.2 mm. This study is of great significance in guiding the design and mechanism investigation of high-performance EM wave absorbers.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Materials Science, Composites
Shu-Liang Li, Yu-Tao Wang, Bo-Wen Liu, Hai-Gang Shi, Hai-Bo Zhao, Yu-Zhong Wang
Summary: A chitosan composite aerogel absorbent with magnetism and conductivity, developed using polyaniline and Fe3O4, provides a safe, efficient, and non-contact method for cleaning up viscous oils. This absorbent can generate heat in an alternating magnetic field and also be heated by sunlight, making it suitable for both regular cleaning and emergency situations.
COMPOSITES COMMUNICATIONS
(2022)
Article
Nanoscience & Nanotechnology
Qingqing Chen, Daxin Li, Xingqi Liao, Zhihua Yang, Dechang Jia, Yu Zhou, Ralf Riedel
Summary: Lightweight SiBCN ceramic nanofibers with tunable electromagnetic wave absorption were prepared by electrostatic spinning and high-temperature annealing techniques. The defect-free nanofibers, composed of an amorphous matrix, beta-SiC, and free carbon nanocrystals, exhibited good microwave absorption properties after annealing at 1600 degrees C. The optimized microstructure endowed the SiBCN ceramic nanofibers with potential applications as lightweight and ultrastrong radar wave absorbers in military and commercial markets.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Jing Quan, Xiaolin Lan, Gwendolyn J. H. Lim, Yi Hou, Yong Yang, Boo Cheong Khoo
Summary: Hierarchical SiC fiber aerogel with a highly porous structure and excellent physical, mechanical, and electromagnetic properties, as well as good thermal insulation performance, has been successfully developed in this study.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Environmental
Heqiang Liu, Yubei Zhang, Xingmin Liu, Wenyan Duan, Minghang Li, Qian Zhou, Shan Li, Gong Wang, Guifang Han
Summary: This study develops modified SiBCN ceramic-based metamaterials with defect-rich carbon nanofibers (CNFs) using additive manufacturing and polymer derived ceramic route. The materials exhibit high permittivity and strong polarization capability with suitable cellulose content and annealing temperature. Additionally, the materials show excellent absorption performance at different thicknesses.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Ceramics
Guiqin You, Daoyang Han, Huijie Tian, Junfang Liang, Chang-An Wang, Keke Yuan, Jilin He, Mingliang Li, Hailong Wang, Rui Zhang, Gang Shao
Summary: Polymer-derived SiCN ceramic aerogels with excellent electromagnetic wave absorption (EMA) properties were successfully fabricated through a combination of the sol-gel, freeze-drying, and polymer precursor conversion methods. The hydrosilylation reaction between the Si-H bond in polysilazane (a polymer ceramic precursor) and the C = C bond in divinylbenzene (a cross-linking agent) occurs to form a wet gel. The effects of the molar ratios of the two bonds (C = C/Si-H) on the microstructure and EMA properties of the SiCN ceramic aerogels were systematically studied.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Zhixin Cai, Lei Su, Hongjie Wang, Min Niu, Liting Tao, De Lu, Liang Xu, Mingzhu Li, Hongfei Gao
Summary: Inspired by the energy dissipation mechanism of lobster shells, researchers have developed a high-performance ceramic aerogel with alternating multilayered structure for excellent electromagnetic wave absorption performance at high temperatures.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Cheng Yang, Chen Zeng, Ping Xu, Weijie Song, Xiangmin Xie, Bei Liu, Jinping Liu, Zhean Su, Qizhong Huang, Huiming Cheng
Summary: SiC nanowires were introduced to reduce the brittleness of coatings and increase the bonding strength, while also serving as thermal conduction channels to improve the ablation resistance.
