Carbon Nanofibers Propped Hierarchical Porous SiOC Ceramics Toward Efficient Microwave Absorption
Abstract The hierarchical porous SiOC ceramics (HPSCs) have been prepared by the pyrolysis of precursors (the mixture of dimethicone and KH-570) and polyacrylonitrile nanofibers (porous template). The HPSCs possess hierarchical porous structure with a BET surface area of 51.4 m2/g and have a good an...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2020-01-01
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| Series: | Nanoscale Research Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s11671-020-3253-y |
| _version_ | 1827842361253691392 |
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| author | Yani Liu Sifan Zeng Zhen Teng Wanlin Feng Haibin Zhang Shuming Peng |
| author_facet | Yani Liu Sifan Zeng Zhen Teng Wanlin Feng Haibin Zhang Shuming Peng |
| author_sort | Yani Liu |
| collection | DOAJ |
| description | Abstract The hierarchical porous SiOC ceramics (HPSCs) have been prepared by the pyrolysis of precursors (the mixture of dimethicone and KH-570) and polyacrylonitrile nanofibers (porous template). The HPSCs possess hierarchical porous structure with a BET surface area of 51.4 m2/g and have a good anti-oxidation property (only 5.1 wt.% weight loss). Owing to the porous structure, the HPSCs deliver an optimal reflection loss value of − 47.9 dB at 12.24 GHz and an effective absorption bandwidth of 4.56 GHz with a thickness of 2.3 mm. The amorphous SiOC, SiOx, and free carbon components within SiOC make contributions to enhancing dipolar polarization. Besides, the abundant interfaces between SiOC and carbon nanofibers (CNFs) are favorable for improving interfacial polarization. The conductive loss arisen from cross-linked CNFs can also boost the microwave absorption performance. |
| first_indexed | 2024-03-12T08:08:22Z |
| format | Article |
| id | doaj.art-f13aee2231af4c4ca5e610b8cbc5c661 |
| institution | Directory Open Access Journal |
| issn | 1931-7573 1556-276X |
| language | English |
| last_indexed | 2024-03-12T08:08:22Z |
| publishDate | 2020-01-01 |
| publisher | SpringerOpen |
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| series | Nanoscale Research Letters |
| spelling | doaj.art-f13aee2231af4c4ca5e610b8cbc5c6612023-09-02T19:22:41ZengSpringerOpenNanoscale Research Letters1931-75731556-276X2020-01-011511710.1186/s11671-020-3253-yCarbon Nanofibers Propped Hierarchical Porous SiOC Ceramics Toward Efficient Microwave AbsorptionYani Liu0Sifan Zeng1Zhen Teng2Wanlin Feng3Haibin Zhang4Shuming Peng5Innovation Research Team for Advanced Ceramics, Institute of Nuclear Physics and Chemistry, China Academy of Engineering PhysicsInnovation Research Team for Advanced Ceramics, Institute of Nuclear Physics and Chemistry, China Academy of Engineering PhysicsInnovation Research Team for Advanced Ceramics, Institute of Nuclear Physics and Chemistry, China Academy of Engineering PhysicsInnovation Research Team for Advanced Ceramics, Institute of Nuclear Physics and Chemistry, China Academy of Engineering PhysicsInnovation Research Team for Advanced Ceramics, Institute of Nuclear Physics and Chemistry, China Academy of Engineering PhysicsInnovation Research Team for Advanced Ceramics, Institute of Nuclear Physics and Chemistry, China Academy of Engineering PhysicsAbstract The hierarchical porous SiOC ceramics (HPSCs) have been prepared by the pyrolysis of precursors (the mixture of dimethicone and KH-570) and polyacrylonitrile nanofibers (porous template). The HPSCs possess hierarchical porous structure with a BET surface area of 51.4 m2/g and have a good anti-oxidation property (only 5.1 wt.% weight loss). Owing to the porous structure, the HPSCs deliver an optimal reflection loss value of − 47.9 dB at 12.24 GHz and an effective absorption bandwidth of 4.56 GHz with a thickness of 2.3 mm. The amorphous SiOC, SiOx, and free carbon components within SiOC make contributions to enhancing dipolar polarization. Besides, the abundant interfaces between SiOC and carbon nanofibers (CNFs) are favorable for improving interfacial polarization. The conductive loss arisen from cross-linked CNFs can also boost the microwave absorption performance.https://doi.org/10.1186/s11671-020-3253-ySiOCCarbon nanofibersPorous ceramicsMicrowave absorption |
| spellingShingle | Yani Liu Sifan Zeng Zhen Teng Wanlin Feng Haibin Zhang Shuming Peng Carbon Nanofibers Propped Hierarchical Porous SiOC Ceramics Toward Efficient Microwave Absorption Nanoscale Research Letters SiOC Carbon nanofibers Porous ceramics Microwave absorption |
| title | Carbon Nanofibers Propped Hierarchical Porous SiOC Ceramics Toward Efficient Microwave Absorption |
| title_full | Carbon Nanofibers Propped Hierarchical Porous SiOC Ceramics Toward Efficient Microwave Absorption |
| title_fullStr | Carbon Nanofibers Propped Hierarchical Porous SiOC Ceramics Toward Efficient Microwave Absorption |
| title_full_unstemmed | Carbon Nanofibers Propped Hierarchical Porous SiOC Ceramics Toward Efficient Microwave Absorption |
| title_short | Carbon Nanofibers Propped Hierarchical Porous SiOC Ceramics Toward Efficient Microwave Absorption |
| title_sort | carbon nanofibers propped hierarchical porous sioc ceramics toward efficient microwave absorption |
| topic | SiOC Carbon nanofibers Porous ceramics Microwave absorption |
| url | https://doi.org/10.1186/s11671-020-3253-y |
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