Fig 1

The preparation flowchart of La2O3@Ti3C2Tx/PU"

Fig 2

The SEM image of La2O3@Ti3C2Tx (a) 50 ℃ (b) 60 ℃ (c) 70 ℃ (d) 80 ℃; (e) EDS mapping of La; (f) Low-magnification SEM; (g) XRD patterns; (h) EDS elemental spectrum."

Fig 3

Band structure and density of states of La2O3@Ti3C2Tx: (a1) Band structure; (a2) Total density of states/Partial density of states; (a3) Partial density of states of La; (a4) Partial density of states of O; (b1) Band structure; (b2) Total density of states/Partial density of states; (b3) Partial density of states of Ti; (b4) Partial density of states of C; (c1) Band structure; (c2) Total density of states/Partial density of states; (c3–c6) Partial density of states of Ti, La, O, and C; (d) Charge density difference (charge redistribution/charge transfer) distribution."

Fig 4

Dielectric constant, Attenuation coefficient, Impedance matching, and Cole-Cole curve of La2O3@Ti3C2Tx/PU (a) real (ε′) parts; (b) imaginary (ε″) parts; (c) dielectric loss tangent (tanδε); (d) Attenuation coefficient; (e) real (μ′) parts; (f) imaginary (μ″) parts; (g) dielectric loss tangent (tanδμ); (h) Eddy current loss coefficient; (i–l) Cole-Cole curve of 50–80 ℃."

Fig 5

Reflection loss curves of La2O3@Ti3C2Tx at different temperatures (50–80 ℃): (a1–d1) Reflection loss (RL) vs. frequency curves at different thicknesses; (a2–d2) 3D surface plot of RL-frequency-thickness; (a3–d3) 2D contour/heat map of RL-frequency-thickness; (a4–d4) Complex-plane plot of the normalized input impedance Zin/Z0."

Fig 6

Reflection loss curves of La2O3@Ti3C2Tx at different temperatures: (a–d) Radar Cross Section (RCS) vs. theta of 50–80 ℃; (e–h) 3D angular RCS scattering pattern of 50–80 ℃."

Fig 7

Schematic diagram of the loss mechanism of La2O3@Ti3C2Tx/PU composite material."

Fig 8

(a) Schematic diagram of FSS structure; The influence of structural parameters on the absorption performance of the material: (b) Thickness H, (c) Length of the metal patch A, (d) Period length C, (e) Incident angles θ."

Fig 9

Electric field cloud diagrams at different frequencies: (a) 8.2 GHz, (b) 10.3 GHz, (c) 12.4 GHz; Magnetic field maps at different frequencies: (d) 8.2 GHz, (e) 10.3 GHz, (f) 12.4 GHz; Current density contour maps at different frequencies: (g) 8.2 GHz, (h) 10.3 GHz, (i) 12.4 GHz."