Honeycomb structure SiCf/Si3N4 composite with broadband electromagnetic absorption performance under a wide temperature range

Xinlei Wang, Xiaomeng Fan, Yongpeng Dong, Haohui Hao, Jimei Xue, Fang Ye

科研成果: 期刊稿件文章同行评审

1 引用 (Scopus)

摘要

SiCf/Si3N4 composites have the potential to be high-temperature absorbing materials, but the impedance mismatch caused by the high dielectric properties leads to narrow absorption bandwidth. Herein, the strategy of combing the high dielectric properties of SiCf/Si3N4 with a periodic structure design was proposed to broaden the absorption bandwidth. The honeycomb structure of the fiber preform was firstly prepared by integrated molding, and the BN interphase and Si3N4 matrix were prepared by chemical vapor infiltration to obtain honeycomb structure SiCf/Si3N4. Through structural parameter design, the effective absorption bandwidth (reflection loss ≤ −10 dB) can achieve 13.1 GHz (4.9–18 GHz) at 25 °C, and it remained 10.5 GHz (7.1–17.6 GHz) when the temperature increases to 1000 °C. The excellent broadband absorption performance is attributed to the high loss ability of SiCf/Si3N4 and the improved impedance matching provided by the honeycomb structure.

源语言英语
文章编号117205
期刊Journal of the European Ceramic Society
45
6
DOI
出版状态已出版 - 6月 2025

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