Ceramic-based meta-material absorber with high-temperature stability  

作　　者：Xing-Cong Chen Wei-Jia Luo Run-Ni Zhao Yong-Zheng Wen Ji Zhou 

机构地区：[1]State Key Laboratory of New Ceramics and Fine Processing,School of Materials Science and Engineering,Tsinghua University,Beijing 100084,China

出　　处：《Rare Metals》2024年第9期4433-4440,共8页稀有金属（英文版）

基　　金：financially supported by the National Key R&D Program of China(No.2022YFB3806000);the National Natural Science Foundation of China(Nos.52332006,92163129,52072203 and 52202370);China Postdoctoral Science Foundation(No.2023T160359)。

摘　　要：With the continuous exploration of uncharted and extreme environments,enhanced temperature robustness of passive devices has become particularly important.In this study,a ceramic-based meta-material absorber with exceptional temperature stability is developed using a fusion design approach that combines rare metal-based tungsten bronze structural ceramics and meta-materials.Specifically,the absorbance of the meta-material array based on Mie resonance exceeds 49.0%in both waveguides and free space,approaching the theoretical limit.According to impedance analysis,the absorption performance can be distinctly correlated with the dielectric loss(Q_(f)).Notably,the high-temperature robustness is verified to still be effective at 400℃.These advancements in our design allow for the use of monolithic materials in fabricating temperature-stable perfect absorbers,providing greater freedom in the dielectric performance and expanding their potential applications,including in space exploration and 5G millimeter-wave scenarios.

关 键 词：Temperature robustness Meta-material absorber Microwave absorption Rare metal-based ceramics MINIATURIZATION 

分 类 号：TQ174.1[化学工程—陶瓷工业] TN03[化学工程—硅酸盐工业]