文献类型：期刊文献

英文题名：Polysilazane hybrid phenolic resin ceramic aerogels with excellent electromagnetic wave absorption performance

作者：Wang, Ruyao[1];Wang, Fan[1];Zhu, Yaping[1];Deng, Shifeng[1];Qi, Huimin[1,2]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Specially Funct Polymer Mat & Related Tech, Minist Educ, Shanghai, Peoples R China;[2]East China Univ Sci & Technol, Key Lab Specially Funct Polymer Mat & Related Tech, Minist Educ, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2024

卷号：107

期号：2

起止页码：1170

外文期刊名：JOURNAL OF THE AMERICAN CERAMIC SOCIETY

收录：;EI(收录号：20234114866429);WOS:【SCI-EXPANDED(收录号:WOS:001093166600001)】；

基金：This work was supported by the Key Laboratory of Specially Functional Polymeric Materials and Related Technology of the Ministry of Education, East China University of Science & Technology, and the Fundamental Research Funds for the Central Universities (50321041918013 and 50321041917001).

语种：英文

外文关键词：ceramic aerogel; electromagnetic wave absorption performance; phenolic resin; polysilazane

摘要：Although various aerogels with electromagnetic wave (EMW) absorbing properties have been extensively explored, the development of aerogels with excellent wave absorption performance, low density, and great heat resistance has still met profound challenges. Herein, polysilazane hybrid phenolic resin aerogels (PRVS aerogels) were prepared using the vinyl addition reaction of polysilazane and cross-linking reaction between polysilazane and phenolic resin. A SiOCN ceramic aerogel with multistage pore structure was prepared via a simple and quick freeze-drying method and polymer-derived ceramic (PDC) methods. The SiOCN ceramic aerogels exhibited low density (0.15-0.27 g/cm3), good heat-shielding (thermal conductivity in the range of 0.03-0.04 W/(m center dot K)), and excellent wave absorption performance (i.e., RL was about -31.6 dB@16.48 GHz and EAB was 3.85 GHz when the thickness of the ceramic aerogel was 1.2 mm). Hence, the ceramic aerogel absorbing materials could meet the requirements of "wide absorption bandwidth, strong reflection loss, lightweight and thi thickness". Moreover, the mechanism of low weight, heat insulation, and wave absorption properties of the aerogels were also investigated. We believe this work is of great significance in ceramic aerogels prepared by traditional polymers, which may provide new opportunities for new ceramic aerogels with applications ranging from EMW absorption to aerospace and information technology.