文献类型：期刊文献

英文题名：Preparation of lightweight, honeycomb-like, wideband microwave absorbing SiC/C aerogels via carbothermal reduction

作者：Zhao, Chuanqing[1];Xia, Shiqi[1];Lv, Yizhe[1];Qi, Huimin[1];Deng, Shifeng[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Specially Funct Polymer Mat & Related Tec, Minist Educ, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2025

卷号：45

期号：5

外文期刊名：JOURNAL OF THE EUROPEAN CERAMIC SOCIETY

收录：;EI(收录号：20244817436831);WOS:【SCI-EXPANDED(收录号:WOS:001414916300001)】；

基金：This work was supported by the Fundamental Research Funds for the Central Universities (JKD01241701) .

语种：英文

外文关键词：SiC aerogel; Carbothermal reduction; Polymer-derived ceramics; Electromagnetic wave absorption

摘要：Based on the micro-nano scale designs for absorbing materials, analyzing the influence of microstructures on absorbing properties is a feasible strategy to achieve efficient lightweight broadband electromagnetic wave absorbers. In this work, the silicon-containing arylacetylene resin, serving as a ceramic polymer precursor, is employed to coat SiO2 gel. Subsequently, the PSA/SiO2 aerogel underwent carbothermal reduction and the polymer-derived ceramics process, transforming it into a SiC/C aerogel. This SiC/C aerogel exhibits a low density of 0.2 g/cm3 and a high porosity of 68 %. The rich morphology of SiC/C aerogel is conducive to both interfacial polarization and multiple scattering, resulting in excellent impedance matching and attenuation. With a reflection loss of-52.6 dB and an effective absorption bandwidth of 6 GHz, SiC/C aerogels also achieve effective absorption in both the X and Ku bands. These results may thus be of great significance in guiding the design and mechanism investigation of high-performance.