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CN-224224684-U - Light high-strength multilayer composite wave-absorbing honeycomb plate

CN224224684UCN 224224684 UCN224224684 UCN 224224684UCN-224224684-U

Abstract

The utility model discloses a light high-strength multilayer composite wave-absorbing honeycomb plate which comprises a wave-transmitting protective layer, a honeycomb core layer, an absorption layer and a supporting layer, wherein a grid layer is arranged between the wave-transmitting protective layer and the honeycomb core layer, a plurality of cones which are equidistantly arranged are arranged on the outer wall of the bottom of the honeycomb core layer, gaps among the cones are filled with the absorption layer, and carbon nano tubes which are distributed in a gradient mode are arranged inside the absorption layer. The wave-transparent protective layer is made of a composite material of quartz fibers and epoxy resin, the thickness of the wave-transparent protective layer is 0.2mm, and the grid layer is made of carbon fibers. The light high-strength multilayer composite wave-absorbing honeycomb plate disclosed by the utility model has the effect of improving the mechanical strength and the broadband wave-absorbing performance.

Inventors

  • WANG GANG
  • XU RUCHUN
  • DENG JIAZHONG

Assignees

  • 佛山市康泰威新材料有限公司

Dates

Publication Date
20260512
Application Date
20250603

Claims (7)

  1. 1. The utility model provides a compound wave-absorbing honeycomb board of light high strength multilayer, includes wave-transparent protective layer (1), honeycomb sandwich layer (3), absorbed layer (4) and supporting layer (5), its characterized in that, wave-transparent protective layer (1) with be provided with between honeycomb sandwich layer (3) grid layer (2), be provided with cone (6) that a plurality of equidistance was arranged on the bottom outer wall of honeycomb sandwich layer (3), absorbed layer (4) are filled a plurality of clearance between cone (6), just absorbed layer (4) inside be provided with be gradient distribution's carbon nanotube.
  2. 2. The light high-strength multilayer composite wave-absorbing honeycomb board according to claim 1, wherein the wave-transparent protective layer (1) is made of a composite material of quartz fiber and epoxy resin, the thickness of the wave-transparent protective layer (1) is 0.2mm, and the grid layer (2) is made of carbon fiber.
  3. 3. The light high-strength multilayer composite wave-absorbing honeycomb board according to claim 2, wherein the honeycomb core layer (3) is made of aramid paper honeycomb material.
  4. 4. The light high-strength multilayer composite wave-absorbing honeycomb plate according to claim 1, wherein eight main grooves (8) which are uniformly distributed radially are formed in the top outer wall of the supporting layer (5), a plurality of auxiliary grooves (7) are formed between every two adjacent main grooves (8), and conductive adhesive is filled in the main grooves (8) and the auxiliary grooves (7).
  5. 5. The light high-strength multilayer composite wave-absorbing honeycomb plate according to claim 4, wherein the main groove (8) and the auxiliary groove (7) are mutually communicated to form a bionic spider-web structure.
  6. 6. The light high-strength multilayer composite wave-absorbing honeycomb panel according to claim 5, wherein the supporting layer (5) is made of a carbon fiber and epoxy resin composite material and has a thickness of 1mm.
  7. 7. The light high-strength multilayer composite wave-absorbing honeycomb panel according to claim 1, characterized in that the absorption layer (4) is arranged between the honeycomb core layer (3) and the support layer (5), and the thickness of the absorption layer (4) is 0.2mm.

Description

Light high-strength multilayer composite wave-absorbing honeycomb plate Technical Field The utility model relates to the technical field of electromagnetic wave-absorbing materials and composite materials, in particular to a light high-strength multilayer composite wave-absorbing honeycomb plate. Background The wave-absorbing honeycomb plate is a functional composite material which has the characteristics of light honeycomb structure and high strength and can effectively absorb electromagnetic waves (radar waves, microwaves and the like). The method is mainly applied to the fields of stealth technology, electromagnetic shielding, microwave darkroom and the like, and can obviously reduce radar reflection section (RCS) of a target object and avoid being detected by a radar. However, the traditional wave-absorbing honeycomb plate has the problems of poor mechanical property and narrow wave-absorbing frequency band, so that the structural strength and electromagnetic wave absorption performance are difficult to be simultaneously achieved, the weight is insufficient, and the application of the traditional wave-absorbing honeycomb plate in the fields of stealth equipment and the like is limited. For example, the strength of the traditional aramid fiber honeycomb is reduced due to the fact that an excessive amount of wave absorbing agent is required to be added due to the insulation characteristic, broadband impedance matching cannot be achieved through a single-layer structure, and the performance is drastically reduced in a complex electromagnetic environment. Disclosure of utility model The utility model discloses a light high-strength multilayer composite wave-absorbing honeycomb plate, which aims to solve the technical problems that the wave-absorbing honeycomb plate has poor mechanical property and narrow wave-absorbing frequency band, so that the structural strength and electromagnetic wave absorption performance are difficult to be compatible, the light weight is insufficient, and the application of the wave-absorbing honeycomb plate in the fields of stealth equipment and the like is limited. In order to achieve the above purpose, the present utility model adopts the following technical scheme: The light high-strength multilayer composite wave-absorbing honeycomb plate comprises a wave-transmitting protective layer, a honeycomb core layer, an absorption layer and a supporting layer, wherein a grid layer is arranged between the wave-transmitting protective layer and the honeycomb core layer, a plurality of cones which are equidistantly arranged are arranged on the outer wall of the bottom of the honeycomb core layer, the absorption layer fills a plurality of gaps among the cones, and carbon nanotubes which are distributed in a gradient mode are arranged inside the absorption layer. In the scheme, the composite wave-absorbing honeycomb plate adopts a multi-layer structure, and the cooperative optimization of mechanics and wave-absorbing performance is realized by arranging a grid layer, a cone structure and a gradient carbon nano tube absorption layer, wherein the grid layer improves the bonding strength of a wave-transmitting protection layer and a honeycomb core, the cone structure increases the contact area of the absorption layer, the interface stress transfer efficiency is effectively improved, the carbon nano tubes (1-5 wt%) distributed in the inner gradient of the absorption layer form an optimized impedance gradual change structure, and the gradual attenuation of electromagnetic waves is realized. In a preferred scheme, eight radial evenly distributed main grooves are formed in the outer wall of the top of the supporting layer, a plurality of auxiliary grooves are formed between every two adjacent main grooves, and conductive adhesive is filled in the main grooves and the auxiliary grooves. Particularly, eight main grooves are distributed in a 45-degree equiangular radial mode, and are matched with a plurality of auxiliary grooves to form a complete conductive network, so that the electromagnetic loss efficiency of the supporting layer 5 in an 8GHz frequency band is improved by 40%, the reflection loss is reduced to-12.4 dB, an epoxy resin system (viscosity 50 mPa.s) containing 2wt% of carbon nano tubes is selected as conductive adhesive filled in the grooves, a stable three-dimensional conductive path is formed after the conductive adhesive is solidified at 60 ℃, the volume resistivity is controlled at 10 2 Ω.cm, good combination of the conductive adhesive and a carbon fiber substrate is ensured, and good conductivity is ensured. The light high-strength multilayer composite wave-absorbing honeycomb plate comprises a wave-transmitting protective layer, a honeycomb core layer, an absorption layer and a supporting layer, wherein a grid layer is arranged between the wave-transmitting protective layer and the honeycomb core layer, a plurality of cones which are equidistantly arranged are arranged on the