Structural composite wave-absorbing material and preparation method thereof

A composite wave absorbing material and composite material technology are applied in the field of structural composite wave absorbing materials and their preparation, which can solve the problems of reduced mechanical properties and increased mass, and achieve the effects of good interface compatibility, strong absorption, and widening absorption bandwidth.

Pending Publication Date: 2021-02-02
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For traditional absorbing materials, such as published patents CN1767757A, CN109526192A, etc., the method of broadening the absorption frequency band is usually to increase the content of the absorber or increase the thickness of the material, but it will also bring about the disadvantages of increased mass and reduced mechanical properties, which is difficult to meet actual needs.

Method used

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  • Structural composite wave-absorbing material and preparation method thereof
  • Structural composite wave-absorbing material and preparation method thereof
  • Structural composite wave-absorbing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Step 1: Select 20 layers of EW100 glass fiber cloth and 10 layers of QW100 quartz fiber cloth, and cut them into samples with a size of 180mm*180mm.

[0034] Step 2: Take 5 layers of glass fiber cloth and 10 layers of quartz fiber cloth, weigh 3068 epoxy resin according to the volume ratio of fiber and resin at 60:40, and evenly coat it on 5 layers of glass fiber cloth and 10 layers of quartz fiber On a cloth, let dry naturally.

[0035] Step 3: Take 5 layers of glass fiber cloth, weigh 3068 epoxy resin according to the volume ratio of fiber and resin at 60:40, take the magnetic metal absorbent according to the volume ratio of the magnetic metal absorbent in the resin matrix as 30%, and put It mixes well with epoxy resin. Spread it evenly on 5 layers of glass fiber cloth and let it dry naturally.

[0036] Step 4: take 10 layers of glass fiber cloth, take by weighing 3068 epoxy resin according to the volume ratio of fiber and resin as 55:45, take by weighing the magnet...

Embodiment 2

[0042] Step 1: Select 20 layers of EW100 glass fiber cloth and 10 layers of QW100 quartz fiber cloth, and cut them into samples with a size of 180mm*180mm.

[0043] Step 2: Take 5 layers of glass fiber cloth and 10 layers of quartz fiber cloth, weigh 3068 epoxy resin according to the volume ratio of fiber and resin as 55:45, and evenly coat it on 5 layers of glass fiber cloth and 10 layers of quartz fiber On a cloth, let dry naturally.

[0044] Step 3: take 5 layers of glass fiber cloth, weigh 3068 epoxy resin according to the volume ratio of fiber and resin at 50:50, take the magnetic metal absorbent according to the volume ratio of the magnetic metal absorbent in the resin matrix as 5%, and It mixes well with epoxy resin. Spread it evenly on 5 layers of glass fiber cloth and let it dry naturally.

[0045] Step 4: take 5 layers of glass fiber cloth, take by weighing 3068 epoxy resin according to the volume ratio of fiber and resin as 60:40, take by weighing the magnetic met...

Embodiment 3

[0052] The preparation steps and conditions of this embodiment are basically the same as those of Example 2, except that the volume ratio of fiber and resin in step 1 is changed to 50:50, and the magnetic absorbent is replaced by a dielectric absorbent, wherein the dielectric used in step 3 The electroabsorbent mass ratio is 0.1%, the dielectric absorbent mass ratio used in step 4 is 2%, and the dielectric absorbent mass ratio used in step 5 is 5%, then the paving in step 7 The absorber in the layer should be modified to the above ratio, and solidified to obtain a structural composite wave-absorbing material. The structural composite absorbing material also has good absorbing performance.

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Abstract

The invention discloses a structural composite wave-absorbing material and a preparation method thereof, which belong to the technical field of materials. The structural composite wave-absorbing material is composed of a fiber-reinforced resin-based composite material, an absorbent and a metamaterial wave-absorbing structure. Different layers of fiber cloth are uniformly coated with resin and a mixture of resin and absorbent and are combined with the metamaterial wave-absorbing structure to form a laminated structure to obtain the wave-absorbing material. According to the composite wave-absorbing material with the structure, the bearing mechanical property of the composite material structure is maintained, meanwhile, the material absorption bandwidth is effectively widened, and strong absorption of key frequency bands is realized.

Description

technical field [0001] The invention relates to a structural composite wave-absorbing material and a preparation method thereof, belonging to the technical field of materials. Background technique [0002] Structural absorbing materials not only have the advantages of high specific stiffness, specific strength and light weight inherent in composite materials, but also have a wider absorbing frequency band and stronger absorption efficiency, as well as good designability and environmental resistance. It is an important means for the generation of equipment to achieve the low detectability of the target. [0003] As an important component of structural wave-absorbing materials, the structural wave-absorbing material compounded with electromagnetic metamaterials has the remarkable advantage of strong designability. Without increasing the weight and thickness of the material, the design frequency range can be obtained by changing the structure of the electromagnetic metamaterial...

Claims

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Application Information

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IPC IPC(8): H05K9/00B29C70/88
CPCH05K9/0088H05K9/009B29C70/882
Inventor 林海燕赵宏杰吕通刘甲宫元勋邢孟达马向雨
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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