文献类型：期刊文献

英文题名：Design and performance study of ultra-high temperature CaMnO3/ polysilylaryl-enyne absorbing material

作者：Wang, Chao[1];Zhao, Chuanqing[1];Peng, Haiyi[2];Lin, Huixing[2];Takats, Viktor[3];Deng, Shifeng[1];Yao, Xiaogang[2]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Specially Funct Polymer Mat & Related Tech, Minist Educ, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Shanghai Inst Ceram, Informat Mat & Devices Res Ctr, 588 Heshuo Rd, Shanghai 201899, Peoples R China;[3]Inst Nucl Res, Isotope Climatol & Environm Res Ctr, H-4026 Debrecen, Hungary

年份：2024

卷号：50

期号：11

起止页码：20421

外文期刊名：CERAMICS INTERNATIONAL

收录：;EI(收录号：20241415836822);WOS:【SCI-EXPANDED(收录号:WOS:001292258000001)】；

基金：Acknowledgements This work was financially supported by the National Natural Science Foundation of China (No. 52302122) .

语种：英文

外文关键词：A. Sintering; B. Composites; C. Electrical properties; C. Thermal properties; D. Functional applications

摘要：This work describes the preparation and properties of a novel category of thermosetting microwave absorbing composite materials. The composites were prepared by a simple solution casting process, employing high temperature resistant polysilylaryl-enyne (abbreviated as PSAE) resin as matrix and perovskite CaMnO3 (abbreviated as CMO) ceramic filler as absorbent filler. The microstructure, electromagnetic, wave absorbing and thermal properties of the CMO-PSAE composites were all examined. The results showed that the increasing fraction of CaMnO3 filler not only densified the microstructure of the composites, but also greatly improved their temperature resistance, thermal conductivity and wave absorption properties. The CMO-PSAE composite doped with 50 vol% CaMnO3 ceramic filler showed the strongest ability to absorb electromagnetic waves, with an effective absorption bandwidth (EAB) of 4.16 GHz and a minimum reflection loss is -53.01 dB. Besides, the thermal conductivity of the composite reached 1.106 W/(m & sdot;K). Furthermore, this composite material has exceptional thermal resistance, with the highest Td5 reaching 650 degrees C. Composites with varying doping levels can be used for specific performance needs in practical scenarios. Thus, such novel CMO-PSAE composites exhibit potential applications in the electromagnetic countermeasure field under high-temperature environments.