Light broadband multi-frequency-band strong-absorption double-layer structure honeycomb wave-absorbing plate and preparation method thereof

Abstract

The invention belongs to the technical field of wave-absorbing materials, and discloses a light broadband multi-frequency-band strong-absorption double-layer structure honeycomb wave-absorbing plate and a preparation method thereof. The light broadband multi-frequency-band strong-absorption double-layer structure honeycomb wave-absorbing plate is sequentially provided with an upper-layer skin, a surface-layer wave-absorbing honeycomb core, a bonding layer, a bottom-layer wave-absorbing honeycomb core, a bottom-layer skin and a reflecting layer from top to bottom, wherein various layers are adhered, the surface of the surface-layer wave-absorbing honeycomb core is dipped with a first wave-absorbing coating material, the surface of the bottom-layer wave-absorbing honeycomb core is sprayed with a second wave-absorbing coating material, and the outer side of the second wave-absorbing coating material is dipped with the first wave-absorbing coating material. According to the invention, honeycomb is sprayed and dipped with the wave-absorbing coating material, and the impedance matching design is carried out on the upper-layer skin, the surface-layer wave-absorbing honeycomb, the bottom-layer wave-absorbing honeycomb, the bottom-layer skin and the reflecting layer, so that the wave-absorbing strength is further improved and the wave-absorbing frequency band is widened under the condition of meeting the environmental use requirements so as to widen the frequency band of the honeycomb wave-absorbing plate and improve the absorption peak strength of the honeycomb wave-absorbing plate.

Description

technical field [0001] The invention belongs to the technical field of wave absorbing materials, and in particular relates to a light-weight broadband multi-band strong absorption double-layer structure honeycomb wave absorbing board and a preparation method thereof. Background technique [0002] As one of the important materials for the application of weapons and equipment, radar absorbing materials have always been a focus of the frontier of national defense science and technology. They can reduce the reflection and scattering of electromagnetic waves through their own absorption and attenuation, so as to achieve the loss of electromagnetic waves and greatly reduce the target. Radar Scattering Interface (RSC) to improve its survivability, defense and overall combat capability. [0003] Radar absorbing materials can be divided into coating type and structural type according to the material forming process and bearing capacity. Structural radar absorbing material is a kind o...

AI Technical Summary

Problems solved by technology

[0005] The method for preparing a honeycomb wave-absorbing board in the prior art includes: 1) dipping or spraying a kind of wave-absorbing coating on the surface of a single-layer honeycomb, and the prepared honeycomb wave-absorbing board has the characteristics of narrow wave-absorbing frequency band or low wave-absorbing intensity; 2) The multi-layer absorbing honeycomb structure can improve the absorbing intensity and broaden the absorbing frequency band, but it has the characteristics of complicated process and increased cost.

Images