Electrostatic Self-assembled Ceramic Magnetic Ti3C2Tx Nanocomposites Reinforced with Hollow Fe3O4 Particles for Strong and Broadband Absorption of Electromagnetic Waves

Developing materials with strong and broadband electromagnetic wave absorption (EWA) is one of the efficient ways to address the electromagnetic (EM) pollution. In this work, Fe3O4/Ti3C2Tx ceramic composites with a unique heterogeneous structure were constructed by electrostatic self-assembly of lamellar Ti3C2Tx and hollow Fe3O4 (HFO) particles. Altering the content of HFO and Ti3C2Tx successfully tuned the EM parameters. To be specific, when the mass ratio of HFO to Ti3C2Tx is 1:2, effective absorption bandwidth (EAB) is 4.8 GHz at 2.2 mm. Reflection loss (RL) even reaches -57.17 dB at 1.8 mm when HFO to Ti3C2Tx is 2:1. The satisfying EWA performance results from the special heterogeneous structure of the Fe3O4/Ti3C2Tx composites, which significantly optimizes the impedance matching and enhances magnetic and electric losses. Notably, at an incidence angle of 15°, HF/T-2 composites exhibit the largest RCS reduction value (18.73 dB m2) in the computer simulation technology simulation confirming the excellent EWA performance of Fe3O4/Ti3C2Tx ceramic composites. This work provides a new way to prepare magnetic MXene ceramic composites with strong and broadband EWA performance.