Cross-dimensional assembly of MXene/SiO <sub>2</sub> /KNF composite aerogels for radar and infrared stealth
Shuo Zhang, Fushuo Wu, Feiyue Hu, Peiying Hu, Min Li, Peng Zeng, Peigen Zhang, Tianyu Wang, Shuangshuang Chen, Jian Liu, Longzhu Cai, Zhengming Sun
Abstract
/KNF aerogel (MSKA) has a bionic-inspired "root-soil" structure, which effectively reduces infrared radiation intensity through multiple scattering effects and enhances electromagnetic wave attenuation by optimizing spatial impedance matching and introducing multiple loss mechanisms. The MSKA exhibits excellent microwave absorption, achieving a minimum reflection loss (RL) of -64.69 dB at a thickness of 1.83 mm, with an effective absorption bandwidth (RL < -10 dB) covering 7.2 GHz; thermal testing reveals a surface temperature difference of 123.1 °C under a 175 °C heat source, indicating a significant reduction in infrared radiation intensity. This assembly strategy, enabling independent regulation of electromagnetic loss and thermal conduction through multidimensional integration, provides new insights for developing lightweight, high-performance, and multispectral stealth materials.