Boosting electromagnetic wave absorption of Ti ₃AlC ₂ by improving effective electrical conductivity

Electromagnetic wave absorbing (EMA) materials at high temperatures are limited by poor conduction loss. However, adding conductors simultaneously increases loss and interface polarization loss, leading to a conflict between impedance matching electromagnetic This will prevent waves from entering EMA materials, finally reducing the overall performance. Here, effective electrical conductivity is enhanced synchronizing particle size grain number of Ti3AlC2 in order increase avoid As result, best performance with an absorption bandwidth (EAB) 4.8 GHz (10.6 ~ 15.4 GHz) thickness only 1.5 mm realized, which combination wide small thickness, minimum reflection (RLmin) reaches -45.6 dB 4.1 GHz. In short, this work explores material regulating mechanism simulated calculations using VASP COMSOL as well series experiments, provides  new insight into rational design anisotropic materials.