Design and fabrication of (Hf0.25Zr0.25Ta0.25Nb0.25)C–SiC ceramics with improved microwave absorbing properties via PDC route
The development of advanced and efficient microwave-absorbing materials through the precise regulation of dielectric loss and impedance matching remains a significant challenge. In this study, (Hf0.25Zr0.25Ta0.25Nb0.25)C–SiC (HEC–SiC) biphasic ceramic powders were synthesized via a single-source-pre...
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| Format: | Article |
| Language: | English |
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Tsinghua University Press
2025-01-01
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| Series: | Journal of Advanced Ceramics |
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| Online Access: | https://www.sciopen.com/article/10.26599/JAC.2024.9220998 |
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| _version_ | 1832589866305585152 |
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| author | Bin Du Saidi Wang Linwei Guo Yimin Ouyang Hanwei Cheng Yajuan Cheng Tao Zhang |
| author_facet | Bin Du Saidi Wang Linwei Guo Yimin Ouyang Hanwei Cheng Yajuan Cheng Tao Zhang |
| author_sort | Bin Du |
| collection | DOAJ |
| description | The development of advanced and efficient microwave-absorbing materials through the precise regulation of dielectric loss and impedance matching remains a significant challenge. In this study, (Hf0.25Zr0.25Ta0.25Nb0.25)C–SiC (HEC–SiC) biphasic ceramic powders were synthesized via a single-source-precursor route. The SiC content was systematically controlled by adjusting the amount of methyltrimethoxysilane. The resulting polymer-derived HEC–SiC composite exhibited a unique microstructure, with nanosized SiC particles uniformly distributed throughout the HEC matrix. As a result, the HEC–SiC-2 composite, containing approximately 21.21 wt% SiC, achieved a minimum reflection loss value (RLmin) of −54.28 dB at 12.39 GHz with a thickness of 3.14 mm. The superior microwave attenuation capability is attributed to optimized impedance matching, enhanced interfacial polarization between the HEC matrix and nanosized SiC, and dipole polarization induced by defects within HEC. This study offers a novel strategy for the fabrication of high-entropy ceramic–SiC biphasic composites with excellent microwave absorbing properties, paving the way for their application in electromagnetic interference shielding and stealth technologies. |
| format | Article |
| id | doaj-art-b68632468ae54defa3cb07347df7ced8 |
| institution | Kabale University |
| issn | 2226-4108 2227-8508 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Tsinghua University Press |
| record_format | Article |
| series | Journal of Advanced Ceramics |
| spelling | doaj-art-b68632468ae54defa3cb07347df7ced82025-01-24T07:52:15ZengTsinghua University PressJournal of Advanced Ceramics2226-41082227-85082025-01-01141922099810.26599/JAC.2024.9220998Design and fabrication of (Hf0.25Zr0.25Ta0.25Nb0.25)C–SiC ceramics with improved microwave absorbing properties via PDC routeBin Du0Saidi Wang1Linwei Guo2Yimin Ouyang3Hanwei Cheng4Yajuan Cheng5Tao Zhang6School of Physics and Materials Science, Guangzhou University, Guangzhou 510006, ChinaSchool of Physics and Materials Science, Guangzhou University, Guangzhou 510006, ChinaSchool of Physics and Materials Science, Guangzhou University, Guangzhou 510006, ChinaSchool of Physics and Materials Science, Guangzhou University, Guangzhou 510006, ChinaSchool of Physics and Materials Science, Guangzhou University, Guangzhou 510006, ChinaSchool of Physics and Materials Science, Guangzhou University, Guangzhou 510006, ChinaSchool of Physics and Materials Science, Guangzhou University, Guangzhou 510006, ChinaThe development of advanced and efficient microwave-absorbing materials through the precise regulation of dielectric loss and impedance matching remains a significant challenge. In this study, (Hf0.25Zr0.25Ta0.25Nb0.25)C–SiC (HEC–SiC) biphasic ceramic powders were synthesized via a single-source-precursor route. The SiC content was systematically controlled by adjusting the amount of methyltrimethoxysilane. The resulting polymer-derived HEC–SiC composite exhibited a unique microstructure, with nanosized SiC particles uniformly distributed throughout the HEC matrix. As a result, the HEC–SiC-2 composite, containing approximately 21.21 wt% SiC, achieved a minimum reflection loss value (RLmin) of −54.28 dB at 12.39 GHz with a thickness of 3.14 mm. The superior microwave attenuation capability is attributed to optimized impedance matching, enhanced interfacial polarization between the HEC matrix and nanosized SiC, and dipole polarization induced by defects within HEC. This study offers a novel strategy for the fabrication of high-entropy ceramic–SiC biphasic composites with excellent microwave absorbing properties, paving the way for their application in electromagnetic interference shielding and stealth technologies.https://www.sciopen.com/article/10.26599/JAC.2024.9220998polymer-derived ceramicshigh-entropy ceramicsmicrowave absorbing propertiessic |
| spellingShingle | Bin Du Saidi Wang Linwei Guo Yimin Ouyang Hanwei Cheng Yajuan Cheng Tao Zhang Design and fabrication of (Hf0.25Zr0.25Ta0.25Nb0.25)C–SiC ceramics with improved microwave absorbing properties via PDC route Journal of Advanced Ceramics polymer-derived ceramics high-entropy ceramics microwave absorbing properties sic |
| title | Design and fabrication of (Hf0.25Zr0.25Ta0.25Nb0.25)C–SiC ceramics with improved microwave absorbing properties via PDC route |
| title_full | Design and fabrication of (Hf0.25Zr0.25Ta0.25Nb0.25)C–SiC ceramics with improved microwave absorbing properties via PDC route |
| title_fullStr | Design and fabrication of (Hf0.25Zr0.25Ta0.25Nb0.25)C–SiC ceramics with improved microwave absorbing properties via PDC route |
| title_full_unstemmed | Design and fabrication of (Hf0.25Zr0.25Ta0.25Nb0.25)C–SiC ceramics with improved microwave absorbing properties via PDC route |
| title_short | Design and fabrication of (Hf0.25Zr0.25Ta0.25Nb0.25)C–SiC ceramics with improved microwave absorbing properties via PDC route |
| title_sort | design and fabrication of hf0 25zr0 25ta0 25nb0 25 c sic ceramics with improved microwave absorbing properties via pdc route |
| topic | polymer-derived ceramics high-entropy ceramics microwave absorbing properties sic |
| url | https://www.sciopen.com/article/10.26599/JAC.2024.9220998 |
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