Synthesis of novel high-entropy diborides with high-efficiency electromagnetic wave absorption and excellent thermal stability
Ceramic materials have obvious advantages in thermal stability, but impedance mismatch limits their ability to attenuate electromagnetic (EM) waves. Herein, a novel series of high-entropy (V0.2Nb0.2Zr0.2Ta0.2X0.2)B2 (X = Mo, Ti, and Hf) ceramics were successfully synthesized via ultrafast high-tempe...
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| Format: | Article |
| Language: | English |
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Tsinghua University Press
2025-02-01
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| Series: | Journal of Advanced Ceramics |
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| Online Access: | https://www.sciopen.com/article/10.26599/JAC.2025.9221030 |
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| author | Chencheng Liu Qingyun Chen Peng Sun Xingye Wang Shuyi Zeng Qijie Chen Tong Zhu Yi Zhu Wenlong Zhang Hui Song Yuezhong Wang Kazuhito Nishimura Huasong Liu Nan Jiang |
| author_facet | Chencheng Liu Qingyun Chen Peng Sun Xingye Wang Shuyi Zeng Qijie Chen Tong Zhu Yi Zhu Wenlong Zhang Hui Song Yuezhong Wang Kazuhito Nishimura Huasong Liu Nan Jiang |
| author_sort | Chencheng Liu |
| collection | DOAJ |
| description | Ceramic materials have obvious advantages in thermal stability, but impedance mismatch limits their ability to attenuate electromagnetic (EM) waves. Herein, a novel series of high-entropy (V0.2Nb0.2Zr0.2Ta0.2X0.2)B2 (X = Mo, Ti, and Hf) ceramics were successfully synthesized via ultrafast high-temperature sintering (UHS) apparatus based on joule heating. The results indicated that the effect of high-entropy component on the magnetic loss of the system was relatively small, but the effect on the dielectric loss was larger. Among them, the (V0.2Nb0.2Zr0.2Ta0.2Ti0.2)B2 (HEB-Ti) sample demonstrated superior absorbing properties due to relatively moderate dielectric loss and optimal EM impedance matching. Moreover, because of its relatively moderate attenuation constant, it could achieve the maximum penetration of the EM wave and the minimum reflection after absorbing wave. As a result, the minimum reflection loss (RLmin) was as low as −40.7 dB, and the effective absorption band covered the entire low-frequency range from 2 to 8 GHz. Its excellent absorption performance was mainly due to the synergistic effect of various dielectric attenuation mechanisms, including defect polarization, dipole polarization, and conduction loss. Furthermore, thermogravimetric (TG) analysis showed that the sample exhibited excellent thermal stability and could withstand temperatures up to 550 °C in air and 1000 °C in an argon gas environment. The relevant work could provide meaningful references for the design of new high-performance ceramic wave-absorbing materials. |
| format | Article |
| id | doaj-art-c8ff95ad7cbd45fe9b168421a916f9c6 |
| institution | DOAJ |
| issn | 2226-4108 2227-8508 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Tsinghua University Press |
| record_format | Article |
| series | Journal of Advanced Ceramics |
| spelling | doaj-art-c8ff95ad7cbd45fe9b168421a916f9c62025-08-20T02:47:49ZengTsinghua University PressJournal of Advanced Ceramics2226-41082227-85082025-02-01142922103010.26599/JAC.2025.9221030Synthesis of novel high-entropy diborides with high-efficiency electromagnetic wave absorption and excellent thermal stabilityChencheng Liu0Qingyun Chen1Peng Sun2Xingye Wang3Shuyi Zeng4Qijie Chen5Tong Zhu6Yi Zhu7Wenlong Zhang8Hui Song9Yuezhong Wang10Kazuhito Nishimura11Huasong Liu12Nan Jiang13College of Physics and Electronic Information Engineering, Guilin University of Technology, Guilin 541004, ChinaCollege of Physics and Electronic Information Engineering, Guilin University of Technology, Guilin 541004, ChinaTianjin Key Laboratory of Optical Thin Films, Tianjin Jinhang Technical Physics Institute, Tianjin 300308, ChinaState Key Laboratory of Advanced Marine Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, ChinaCollege of Physics and Electronic Information Engineering, Guilin University of Technology, Guilin 541004, ChinaCollege of Physics and Electronic Information Engineering, Guilin University of Technology, Guilin 541004, ChinaState Key Laboratory of Advanced Marine Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, ChinaState Key Laboratory of Advanced Marine Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, ChinaState Key Laboratory of Advanced Marine Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, ChinaState Key Laboratory of Advanced Marine Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, ChinaState Key Laboratory of Advanced Marine Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, ChinaState Key Laboratory of Advanced Marine Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, ChinaTianjin Key Laboratory of Optical Thin Films, Tianjin Jinhang Technical Physics Institute, Tianjin 300308, ChinaState Key Laboratory of Advanced Marine Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, ChinaCeramic materials have obvious advantages in thermal stability, but impedance mismatch limits their ability to attenuate electromagnetic (EM) waves. Herein, a novel series of high-entropy (V0.2Nb0.2Zr0.2Ta0.2X0.2)B2 (X = Mo, Ti, and Hf) ceramics were successfully synthesized via ultrafast high-temperature sintering (UHS) apparatus based on joule heating. The results indicated that the effect of high-entropy component on the magnetic loss of the system was relatively small, but the effect on the dielectric loss was larger. Among them, the (V0.2Nb0.2Zr0.2Ta0.2Ti0.2)B2 (HEB-Ti) sample demonstrated superior absorbing properties due to relatively moderate dielectric loss and optimal EM impedance matching. Moreover, because of its relatively moderate attenuation constant, it could achieve the maximum penetration of the EM wave and the minimum reflection after absorbing wave. As a result, the minimum reflection loss (RLmin) was as low as −40.7 dB, and the effective absorption band covered the entire low-frequency range from 2 to 8 GHz. Its excellent absorption performance was mainly due to the synergistic effect of various dielectric attenuation mechanisms, including defect polarization, dipole polarization, and conduction loss. Furthermore, thermogravimetric (TG) analysis showed that the sample exhibited excellent thermal stability and could withstand temperatures up to 550 °C in air and 1000 °C in an argon gas environment. The relevant work could provide meaningful references for the design of new high-performance ceramic wave-absorbing materials.https://www.sciopen.com/article/10.26599/JAC.2025.9221030high-entropy diborides (hebs)ultrafast high-temperature sintering (uhs)electromagnetic (em) wave absorptionimpedance matching |
| spellingShingle | Chencheng Liu Qingyun Chen Peng Sun Xingye Wang Shuyi Zeng Qijie Chen Tong Zhu Yi Zhu Wenlong Zhang Hui Song Yuezhong Wang Kazuhito Nishimura Huasong Liu Nan Jiang Synthesis of novel high-entropy diborides with high-efficiency electromagnetic wave absorption and excellent thermal stability Journal of Advanced Ceramics high-entropy diborides (hebs) ultrafast high-temperature sintering (uhs) electromagnetic (em) wave absorption impedance matching |
| title | Synthesis of novel high-entropy diborides with high-efficiency electromagnetic wave absorption and excellent thermal stability |
| title_full | Synthesis of novel high-entropy diborides with high-efficiency electromagnetic wave absorption and excellent thermal stability |
| title_fullStr | Synthesis of novel high-entropy diborides with high-efficiency electromagnetic wave absorption and excellent thermal stability |
| title_full_unstemmed | Synthesis of novel high-entropy diborides with high-efficiency electromagnetic wave absorption and excellent thermal stability |
| title_short | Synthesis of novel high-entropy diborides with high-efficiency electromagnetic wave absorption and excellent thermal stability |
| title_sort | synthesis of novel high entropy diborides with high efficiency electromagnetic wave absorption and excellent thermal stability |
| topic | high-entropy diborides (hebs) ultrafast high-temperature sintering (uhs) electromagnetic (em) wave absorption impedance matching |
| url | https://www.sciopen.com/article/10.26599/JAC.2025.9221030 |
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