Influence of Absorber Contents and Temperatures on the Dielectric Properties and Microwave Absorbing Performances of C@TiC/SiO<sub>2</sub> Composites
TiC provides a promising potential for high-temperature microwave absorbers due to its unique combination of thermal stability, high electrical conductivity, and robust structural integrity. C@TiC/SiO<sub>2</sub> composites were successfully fabricated using a simple blending and cold-pr...
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MDPI AG
2024-12-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/14/24/2033 |
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| author | Yan Wang Xin Sun Zhihe Xiao Jian Gu Qinyi Dong Shuhang Yi Junyang Jin |
| author_facet | Yan Wang Xin Sun Zhihe Xiao Jian Gu Qinyi Dong Shuhang Yi Junyang Jin |
| author_sort | Yan Wang |
| collection | DOAJ |
| description | TiC provides a promising potential for high-temperature microwave absorbers due to its unique combination of thermal stability, high electrical conductivity, and robust structural integrity. C@TiC/SiO<sub>2</sub> composites were successfully fabricated using a simple blending and cold-pressing method. The effects of C@TiC’s absorbent content and temperature on the dielectric and microwave absorption properties of C@TiC/SiO<sub>2</sub> composites were investigated. The addition of C@TiC from 10 wt.% to 30 wt.% not only endows the composites with a higher dielectric constant and dielectric loss, but also with a greater high-temperature stability in terms of dielectric and microwave absorption properties. The composite with 30 wt.%C@TiC demonstrates a strong microwave absorption capability with a minimum reflection loss (<i>RL<sub>min</sub></i>) of −55.87 dB, −48.49 dB, and −40.36 dB at room temperature, 50 °C, and 100 °C, respectively; the 50 wt.%C@TiC composite exhibits an enhanced high-temperature microwave absorption performance with an <i>RL</i><sub>min</sub> of −16.13 dB and −15.72 dB at 200 °C and 300 °C, respectively. This study demonstrates that the TiC-based absorbers present an innovative solution for high-temperature microwave absorption, providing stability, versatility, and adaptability in extreme operational environments. |
| format | Article |
| id | doaj-art-08ce5a0df5a7415b9688f95f2ccdfd6d |
| institution | OA Journals |
| issn | 2079-4991 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
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| series | Nanomaterials |
| spelling | doaj-art-08ce5a0df5a7415b9688f95f2ccdfd6d2025-08-20T02:01:11ZengMDPI AGNanomaterials2079-49912024-12-011424203310.3390/nano14242033Influence of Absorber Contents and Temperatures on the Dielectric Properties and Microwave Absorbing Performances of C@TiC/SiO<sub>2</sub> CompositesYan Wang0Xin Sun1Zhihe Xiao2Jian Gu3Qinyi Dong4Shuhang Yi5Junyang Jin6National Key Laboratory of Scattering and Radiation, Beijing 100854, ChinaNational Key Laboratory of Scattering and Radiation, Beijing 100854, ChinaNational Key Laboratory of Scattering and Radiation, Beijing 100854, ChinaCollege of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, ChinaNational Key Laboratory of Scattering and Radiation, Beijing 100854, ChinaNational Key Laboratory of Scattering and Radiation, Beijing 100854, ChinaCollege of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, ChinaTiC provides a promising potential for high-temperature microwave absorbers due to its unique combination of thermal stability, high electrical conductivity, and robust structural integrity. C@TiC/SiO<sub>2</sub> composites were successfully fabricated using a simple blending and cold-pressing method. The effects of C@TiC’s absorbent content and temperature on the dielectric and microwave absorption properties of C@TiC/SiO<sub>2</sub> composites were investigated. The addition of C@TiC from 10 wt.% to 30 wt.% not only endows the composites with a higher dielectric constant and dielectric loss, but also with a greater high-temperature stability in terms of dielectric and microwave absorption properties. The composite with 30 wt.%C@TiC demonstrates a strong microwave absorption capability with a minimum reflection loss (<i>RL<sub>min</sub></i>) of −55.87 dB, −48.49 dB, and −40.36 dB at room temperature, 50 °C, and 100 °C, respectively; the 50 wt.%C@TiC composite exhibits an enhanced high-temperature microwave absorption performance with an <i>RL</i><sub>min</sub> of −16.13 dB and −15.72 dB at 200 °C and 300 °C, respectively. This study demonstrates that the TiC-based absorbers present an innovative solution for high-temperature microwave absorption, providing stability, versatility, and adaptability in extreme operational environments.https://www.mdpi.com/2079-4991/14/24/2033core–shell-structured C@TiCC@TiC/SiO<sub>2</sub> compositeshigh-temperature microwave absorption performance |
| spellingShingle | Yan Wang Xin Sun Zhihe Xiao Jian Gu Qinyi Dong Shuhang Yi Junyang Jin Influence of Absorber Contents and Temperatures on the Dielectric Properties and Microwave Absorbing Performances of C@TiC/SiO<sub>2</sub> Composites Nanomaterials core–shell-structured C@TiC C@TiC/SiO<sub>2</sub> composites high-temperature microwave absorption performance |
| title | Influence of Absorber Contents and Temperatures on the Dielectric Properties and Microwave Absorbing Performances of C@TiC/SiO<sub>2</sub> Composites |
| title_full | Influence of Absorber Contents and Temperatures on the Dielectric Properties and Microwave Absorbing Performances of C@TiC/SiO<sub>2</sub> Composites |
| title_fullStr | Influence of Absorber Contents and Temperatures on the Dielectric Properties and Microwave Absorbing Performances of C@TiC/SiO<sub>2</sub> Composites |
| title_full_unstemmed | Influence of Absorber Contents and Temperatures on the Dielectric Properties and Microwave Absorbing Performances of C@TiC/SiO<sub>2</sub> Composites |
| title_short | Influence of Absorber Contents and Temperatures on the Dielectric Properties and Microwave Absorbing Performances of C@TiC/SiO<sub>2</sub> Composites |
| title_sort | influence of absorber contents and temperatures on the dielectric properties and microwave absorbing performances of c tic sio sub 2 sub composites |
| topic | core–shell-structured C@TiC C@TiC/SiO<sub>2</sub> composites high-temperature microwave absorption performance |
| url | https://www.mdpi.com/2079-4991/14/24/2033 |
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