Ordered mesoporous carbon with hierarchical pore structure for high-efficiency electromagnetic wave absorber under thin matching thickness
An enormous challenge exists in the development of low-density and efficient microwave absorbers with thin matching thickness. Carbon materials with hierarchical porosity are regarded as potential candidates for practical applications of microwave absorption (MA) materials on account of their rich p...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-07-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423013042 |
| _version_ | 1827867684894670848 |
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| author | Panpan Zhou Jing Zhang Zhi Song Lixi Wang Qitu Zhang |
| author_facet | Panpan Zhou Jing Zhang Zhi Song Lixi Wang Qitu Zhang |
| author_sort | Panpan Zhou |
| collection | DOAJ |
| description | An enormous challenge exists in the development of low-density and efficient microwave absorbers with thin matching thickness. Carbon materials with hierarchical porosity are regarded as potential candidates for practical applications of microwave absorption (MA) materials on account of their rich pore structure which facilitates the entry and attenuation of electromagnetic waves. Herein, ordered mesoporous carbon with hierarchical interconnected network structure (NOMC) was prepared through a self-assembly method and calcination treatment. It was found that by adjusting the annealing temperature, the hierarchical porous structure, the carbon defect, the dielectric loss property and the MA property could be tuned. Thanks to the balance between sufficient hierarchical porous structure, outstanding impedance matching condition and multiple loss modes, NOMC displays outstanding ability to dissipate electromagnetic waves at a very thin absorbing coating thickness. Notably, as-prepared NOMC-700 displays an outstanding MA property, whose minimum reflection loss (RLmin) value reaches −27.5 dB at 16.72 GHz and the effective absorption bandwidth (EAB) achieves 3.2 GHz (14.8–18 GHz) under 1.5 mm absorbing coatings. Hence, the satisfying design in porous microstructure can pave the way for efficient MA materials with thin matching thickness. |
| first_indexed | 2024-03-12T15:20:59Z |
| format | Article |
| id | doaj.art-98b20ca2ce8746d89cbdcacef811597e |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-12T15:20:59Z |
| publishDate | 2023-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-98b20ca2ce8746d89cbdcacef811597e2023-08-11T05:33:24ZengElsevierJournal of Materials Research and Technology2238-78542023-07-012515601569Ordered mesoporous carbon with hierarchical pore structure for high-efficiency electromagnetic wave absorber under thin matching thicknessPanpan Zhou0Jing Zhang1Zhi Song2Lixi Wang3Qitu Zhang4College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, China; School of Electronic and Information Engineering, Changshu Institute of Technology, Changshu 215500, ChinaCollege of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, China; China Geological Survey, Nanjing Center, Nanjing 210016, China; Supervision and Testing Center of East China, Mineral Resources of the Ministry of Land and Resources, Nanjing 210016, ChinaCollege of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, ChinaCollege of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, China; Corresponding author.College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, China; Corresponding author.An enormous challenge exists in the development of low-density and efficient microwave absorbers with thin matching thickness. Carbon materials with hierarchical porosity are regarded as potential candidates for practical applications of microwave absorption (MA) materials on account of their rich pore structure which facilitates the entry and attenuation of electromagnetic waves. Herein, ordered mesoporous carbon with hierarchical interconnected network structure (NOMC) was prepared through a self-assembly method and calcination treatment. It was found that by adjusting the annealing temperature, the hierarchical porous structure, the carbon defect, the dielectric loss property and the MA property could be tuned. Thanks to the balance between sufficient hierarchical porous structure, outstanding impedance matching condition and multiple loss modes, NOMC displays outstanding ability to dissipate electromagnetic waves at a very thin absorbing coating thickness. Notably, as-prepared NOMC-700 displays an outstanding MA property, whose minimum reflection loss (RLmin) value reaches −27.5 dB at 16.72 GHz and the effective absorption bandwidth (EAB) achieves 3.2 GHz (14.8–18 GHz) under 1.5 mm absorbing coatings. Hence, the satisfying design in porous microstructure can pave the way for efficient MA materials with thin matching thickness.http://www.sciencedirect.com/science/article/pii/S2238785423013042Microwave absorptionOrdered mesoporous carbonHierarchical structureThin matching thickness |
| spellingShingle | Panpan Zhou Jing Zhang Zhi Song Lixi Wang Qitu Zhang Ordered mesoporous carbon with hierarchical pore structure for high-efficiency electromagnetic wave absorber under thin matching thickness Journal of Materials Research and Technology Microwave absorption Ordered mesoporous carbon Hierarchical structure Thin matching thickness |
| title | Ordered mesoporous carbon with hierarchical pore structure for high-efficiency electromagnetic wave absorber under thin matching thickness |
| title_full | Ordered mesoporous carbon with hierarchical pore structure for high-efficiency electromagnetic wave absorber under thin matching thickness |
| title_fullStr | Ordered mesoporous carbon with hierarchical pore structure for high-efficiency electromagnetic wave absorber under thin matching thickness |
| title_full_unstemmed | Ordered mesoporous carbon with hierarchical pore structure for high-efficiency electromagnetic wave absorber under thin matching thickness |
| title_short | Ordered mesoporous carbon with hierarchical pore structure for high-efficiency electromagnetic wave absorber under thin matching thickness |
| title_sort | ordered mesoporous carbon with hierarchical pore structure for high efficiency electromagnetic wave absorber under thin matching thickness |
| topic | Microwave absorption Ordered mesoporous carbon Hierarchical structure Thin matching thickness |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423013042 |
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