Wave-absorbing honeycomb with gradient-distributed absorbents and preparation method of wave-absorbing honeycomb

The invention provides a wave-absorbing honeycomb with absorbents in gradient distribution and a preparation method of the wave-absorbing honeycomb. The wave-absorbing honeycomb is composed of wave-absorbing aramid paper doped with different absorbent contents and resin impregnated on the surface of the aramid paper. The method comprises the following steps: doping absorbents with different contents into aramid paper to obtain serialized wave-absorbing aramid paper; according to the electrical property design, different pieces of aramid fiber paper are arranged in sequence to prepare the wave-absorbing honeycomb, a structure with the impedance gradient gradually changing in the direction perpendicular to the hole grids is formed, and the wave-absorbing honeycomb with the excellent performance in the direction perpendicular to the hole grids is obtained. The absorbent is doped into the aramid paper, the adding amount can be accurately controlled, the process is stable, the obtained wave-absorbing honeycomb has