Electromagnetic wave absorption and mechanical properties of SiC nanowire/low-melting-point glass composites sintered at 580°C in air

Ranran Shi; Wei Lin; Zheng Liu; Junna Xu; Jianlei Kuang; Wenxiu Liu; Qi Wang; Wenbin Cao

doi:10.1007/s12613-023-2653-2

Volume 30 Issue 9

Sep. 2023

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2023 > 30(9): 1809-1815

Ranran Shi, Wei Lin, Zheng Liu, Junna Xu, Jianlei Kuang, Wenxiu Liu, Qi Wang, and Wenbin Cao, Electromagnetic wave absorption and mechanical properties of SiC nanowire/low-melting-point glass composites sintered at 580°C in air, Int. J. Miner. Metall. Mater., 30(2023), No. 9, pp. 1809-1815. https://doi.org/10.1007/s12613-023-2653-2

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Ranran Shi, Wei Lin, Zheng Liu, Junna Xu, Jianlei Kuang, Wenxiu Liu, Qi Wang, and Wenbin Cao, Electromagnetic wave absorption and mechanical properties of SiC nanowire/low-melting-point glass composites sintered at 580°C in air, Int. J. Miner. Metall. Mater., 30(2023), No. 9, pp. 1809-1815. https://doi.org/10.1007/s12613-023-2653-2

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Research Article

Electromagnetic wave absorption and mechanical properties of SiC nanowire/low-melting-point glass composites sintered at 580°C in air

+ Author Affiliations

Corresponding authors:
Jianlei Kuang    E-mail: jlkuang@ustb.edu.cn

Qi Wang    E-mail: wangqi15@ustb.edu.cn

Wenbin Cao    E-mail: wbcao@ustb.edu.cn
Received: 4 October 2022; Revised: 14 April 2023; Accepted: 17 April 2023; Available online: 18 April 2023

Abstract

Abstract

SiC nanowires are excellent high-temperature electromagnetic wave (EMW) absorbing materials. However, their polymer matrix composites are difficult to work at temperatures above 300°C, while their ceramic matrix composites must be prepared above 1000°C in an inert atmosphere. Thus, for addressing the abovementioned problems, SiC/low-melting-point glass composites were well designed and prepared at 580°C in an air atmosphere. Based on the X-ray diffraction results, SiC nanowires were not oxidized during air atmosphere sintering because of the low sintering temperature. Additionally, SiC nanowires were uniformly distributed in the glass matrix material. The composites exhibited good mechanical and EMW absorption properties. As the filling ratio of SiC nanowires increased from 5wt% to 20wt%, the Vickers hardness and flexural strength of the composite reached HV 564 and 213 MPa, which were improved by 27.7% and 72.8%, respectively, compared with the low-melting-point glass. Meanwhile, the dielectric loss and EMW absorption ability of SiC nanowires at 8.2–12.4 GHz were also gradually improved. The dielectric loss ability of low-melting-point glass was close to 0. However, when the filling ratio of SiC nanowires was 20wt%, the composite showed a minimum reflection loss (RL) of −20.2 dB and an effective absorption (RL ≤ −10 dB) bandwidth of 2.3 GHz at an absorber layer thickness of 2.3 mm. The synergistic effect of polarization loss and conductivity loss in SiC nanowires was responsible for this improvement.
- SiC nanowires;
- glass composite;
- flexural strength;
- dielectric properties;
- microwave absorption

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