High-temperature microwave absorbing properties of ordered mesoporous inter-filled SiC/SiO₂ composites

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• 作者：Xiaoyan Yuan^a ; ^{xiaoyanyuan0519@163.com" class="auth_mail" title="E-mail the corresponding author} ; Laifei Cheng^b ; Shouwu Guo^a ; Litong Zhang^b
• 关键词：SiC/SiO2 ; Ordered inter-filled structure ; High-temperature microwave absorption
• 刊名：Ceramics International
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：43
• 期：1
• 页码：282-288
• 全文大小：1349 K

文摘

Ordered mesoporous inter-filled SiC/SiO₂ monolithic composites were prepared via nanocasting and cold-pressing, using polycarbosilane as precursor and mesoporous silica SBA-15 as structural template. Their high-temperature dielectric properties and microwave attenuation performances were evaluated at the temperature rang of 25–500° C in X-band (8.2–12.4 GHz). The results indicated that the composites exhibited good high-temperature microwave absorbing properties, and attenuation mechanisms were also proposed. The calculated reflection loss (RL) suggested that the ordered inter-filled SiC/SiO₂ composite will be a good candidate as microwave absorbing materials in high-temperature environment.