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Polymer-Derived Lightweight SiBCN Ceramic Nanofibers with High Microwave Absorption Performance

Chen, Qingqing ; Li, Daxin ; Liao, Xingqi ; Yang, Zhihua ; Jia, Dechang ; Zhou, Yu ; Riedel, Ralf (2021):
Polymer-Derived Lightweight SiBCN Ceramic Nanofibers with High Microwave Absorption Performance.
In: ACS Applied Materials & Interfaces, 13 (29), pp. 34889-34898. ACS Publications, ISSN 1944-8244, e-ISSN 1944-8252,
DOI: 10.1021/acsami.1c07912,
[Article]

Abstract

Lightweight SiBCN ceramic nanofibers were prepared by a combination of electrostatic spinning and high-temperature annealing techniques, showing tunable electromagnetic wave absorption. By controlling the annealing temperature, the nanoscale architectures and atomic bonding structures of asprepared nanofibers could be well regulated. The resulting SiBCN nanofibers similar to 300 nm in diameter, which were composed of an amorphous matrix, beta-SiC, and free carbon nanocrystals, were defect-free after annealing at 1600 degrees C. SiBCN nanofibers annealed at 1600 degrees C exhibited good microwave absorption, obtaining a minimum reflection coefficient of -56.9 dB at 10.56 GHz, a sample thickness of 2.6 mm with a maximum effective absorption bandwidth of 3.45 GHz, and a maximum dielectric constant of 0.44. Owing to the optimized A + B + C microstructure, SiBCN ceramic nanofibers with satisfying microwave absorption properties endowed the nanofibers with the potential to be used as lightweight, ultrastrong radar wave absorbers applied in military and the commercial market.

Item Type: Article
Erschienen: 2021
Creators: Chen, Qingqing ; Li, Daxin ; Liao, Xingqi ; Yang, Zhihua ; Jia, Dechang ; Zhou, Yu ; Riedel, Ralf
Title: Polymer-Derived Lightweight SiBCN Ceramic Nanofibers with High Microwave Absorption Performance
Language: English
Abstract:

Lightweight SiBCN ceramic nanofibers were prepared by a combination of electrostatic spinning and high-temperature annealing techniques, showing tunable electromagnetic wave absorption. By controlling the annealing temperature, the nanoscale architectures and atomic bonding structures of asprepared nanofibers could be well regulated. The resulting SiBCN nanofibers similar to 300 nm in diameter, which were composed of an amorphous matrix, beta-SiC, and free carbon nanocrystals, were defect-free after annealing at 1600 degrees C. SiBCN nanofibers annealed at 1600 degrees C exhibited good microwave absorption, obtaining a minimum reflection coefficient of -56.9 dB at 10.56 GHz, a sample thickness of 2.6 mm with a maximum effective absorption bandwidth of 3.45 GHz, and a maximum dielectric constant of 0.44. Owing to the optimized A + B + C microstructure, SiBCN ceramic nanofibers with satisfying microwave absorption properties endowed the nanofibers with the potential to be used as lightweight, ultrastrong radar wave absorbers applied in military and the commercial market.

Journal or Publication Title: ACS Applied Materials & Interfaces
Journal volume: 13
Number: 29
Publisher: ACS Publications
Uncontrolled Keywords: SiBCN, nanofibers, electrospinning dielectric properties, electromagnetic wave absorption, SINGLE-SOURCE-PRECURSOR, ELECTROMAGNETIC PROPERTIES, HOLLOW MICROSPHERES, CARBON NANOWIRES, PDCS-SIBCN, METAL-FREE, COMPOSITES, SICN, FIBERS, SHELL
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
Date Deposited: 23 Sep 2021 05:27
DOI: 10.1021/acsami.1c07912
Additional Information:

National Natural Science Foundation of China (NSFC), Grant Numbers 52002092, 51832002. China Postdoctoral Science Foundation, Grant Numbers BX20190095, LBH-Z19141.

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