Engineering multi-relaxation interfaces in Ti₃C₂T _x for reducing wideband radar cross section

The development of multifunctional electromagnetic wave (EMW) absorbing materials become the inevitable course for the rapid progress of military weapons and 5 G smart communication technology. The construction of engineered multi-relaxation interfaces provides an effective means for materials to enhance EMW attenuation. Herein, MXene derived Ti₃C₂T _x /TiO₂ heterogeneous interface is tailored through the in-situ anneal, where the multi-relaxation nano-interfaces are achieved. When the annealed temperature reaches 450 °C, the maximum reflection loss of Ti₃C₂T _x /TiO₂ is −30.4 dB at 5.67 GHz due to the enhanced interfacial polarization and optimized impedance matching. More importantly, an effective reduction in the radar cross section up to −53 dBm² was achieved by using the Ti₃C₂T _x /TiO₂ as the octagonal patch through effective shape design. Therefore, we believe that Ti₃C₂T _x /TiO₂ with optimized shape has a broad application prospect in the field of radar stealth and practical electromagnetic protection.