SiC particles/Ti3C2Tx Aerogel with Tunable Electromagnetic Absorption Performance in Ku band

In response to the issues stemming from electromagnetic wave (EMW) radiation or pollution, there has been a growing emphasis on the research and development of novel electromagnetic wave absorbing materials. In this work, we synthesized an EMW absorbing aerogel composed of SiC particles and Ti3C2Tx, with the structure regulated by PVA. The aerogel features a well-organized 3D network comprising Ti3C2Tx nanosheets (NSs), SiC particles, and PVA wires. At a mass ratio of 1:1 for SiC particles to Ti3C2Tx, the aerogel, when combined with PVA, demonstrated a remarkable reflection loss of -54.5 dB in the Ku band and an effective absorption bandwidth (EAB) of 5.4 GHz at a thickness of 2.04 mm. Even at low densities of 8.8 mg·cm−3, the aerogel demonstrated significant mechanical strength, supporting a load equivalent to 1000 times its weight. The superior absorption capabilities of the SiC particles/Ti3C2Tx aerogel can be ascribed to the multiple interface polarization between Ti3C2Tx and SiC particles, and the impedance matching improved by the presence of PVA. These findings underscore the exceptional EMW absorption properties of the SiC particles/Ti3C2Tx aerogel, particularly in the Ku band.