Preparation and microwave absorption performance of SiC aerogel via sol-gel and carbonization reduction process

IF 5 Q1 ENGINEERING, MULTIDISCIPLINARY Defence Technology(防务技术) Pub Date : 2024-12-01 DOI:10.1016/j.dt.2024.08.006
Xinli Ye , Pengyi Xu , Hao Yu , Shan Li , Xiaomin Ma , Wei Xu , Junxiong Zhang
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Abstract

SiC aerogel presents several advantageous features like lightweight and high temperature resistance when applied as microwave absorbing material. In this paper, SiC aerogel was prepared eventually followed by the sol-gel and carbonization reduction process. The results showed that the effective electromagnetic microwave absorption capacity of SiC aerogel was highly increased after being pyrolyzed at 1500 °C, which presented a minimum reflection loss value of −57.80 dB at 3.10 mm and 9.86 GHz. Besides, the electromagnetic parameters of SiC aerogel with different paraffin ratios were discussed as well as the varying electromagnetic microwave absorption performances. The minimum reflection loss value first rose then fell as the SiC/paraffin ratio increased, which demonstrated the importance of SiC content. This study establishes the theoretical foundation for the subsequent functional application of SiC aerogel.

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通过溶胶-凝胶和碳化还原工艺制备碳化硅气凝胶及其微波吸收性能
碳化硅气凝胶作为微波吸收材料具有重量轻、耐高温等优点。本文采用溶胶凝胶法和碳化还原法制备了碳化硅气凝胶。结果表明,SiC 气凝胶在 1500 ℃ 高温热解后,其有效电磁微波吸收能力显著提高,在 3.10 mm 和 9.86 GHz 频率下的最小反射损耗值为 -57.80 dB。此外,还讨论了不同石蜡比例的碳化硅气凝胶的电磁参数以及不同的电磁微波吸收性能。随着碳化硅/石蜡比的增加,最小反射损耗值先升后降,这表明了碳化硅含量的重要性。这项研究为碳化硅气凝胶的后续功能应用奠定了理论基础。
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来源期刊
Defence Technology(防务技术)
Defence Technology(防务技术) Mechanical Engineering, Control and Systems Engineering, Industrial and Manufacturing Engineering
CiteScore
8.70
自引率
0.00%
发文量
728
审稿时长
25 days
期刊介绍: Defence Technology, a peer reviewed journal, is published monthly and aims to become the best international academic exchange platform for the research related to defence technology. It publishes original research papers having direct bearing on defence, with a balanced coverage on analytical, experimental, numerical simulation and applied investigations. It covers various disciplines of science, technology and engineering.
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