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A kind of stealth composite material and preparation method thereof

A technology for composite materials and substrates, applied in the field of composite materials, can solve the problems of high processing difficulty and large thickness of wave absorbing materials, and achieve the effects of overcoming easy oxidation, good electrical conductivity, and solving high prices.

Active Publication Date: 2021-04-06
秦振山 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The absorbing materials prepared by these materials and methods have the disadvantages of large thickness and high processing difficulty, which have become technical obstacles that need to be further overcome by those skilled in the art.

Method used

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  • A kind of stealth composite material and preparation method thereof
  • A kind of stealth composite material and preparation method thereof
  • A kind of stealth composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] figure 1 It shows a schematic diagram of the structure of the composite material according to the embodiment of the present invention, from top to bottom are: infrared stealth layer 1, the first electromagnetic wave resonance control layer 2, the first wave absorbing layer 3, the second electromagnetic wave resonance control layer 4, the first Two wave-absorbing layer 5, diversion layer 6, heat insulation and infrared radiation protection layer 7.

[0075] figure 2 The steps of forming the infrared stealth layer 1 according to the embodiment of the present invention are shown. The infrared stealth layer 1 is a TPU composite material with a thickness of 0.1 mm. Take 20% of the scaly conductive mica powder with a particle size of 35 μm, and 15% of the dendritic silver-plated copper powder with an average particle size of 23 μm.

[0076] S101: Put 20% of the adhesive thinner into the conductive mica powder;

[0077] S102: After uniform ultrasonic vibration, add 15% si...

Embodiment 2

[0094] Preparation of infrared stealth layer 1. For TPU composite materials, take 25% of flake-like conductive mica powder with a particle size of 40 μm, take 20% of dendritic silver-plated copper powder with an average particle size of 25 μm, and put 20% of adhesive thinner into conductive mica powder. Add silver-plated copper powder, add 35% of adhesive, and stir for 40 to 60 minutes to form an infrared stealth layer slurry; by spraying, a 50 μm thick anti-infrared film is formed on the B surface of the TPU film with a thickness of 0.3 mm; after curing at room temperature or It is cured and molded by an oven at a certain temperature.

[0095] Preparation of the first electromagnetic wave resonance control layer 2 . The FPC single-sided flexible board material is selected, and the copper foil on the polyimide substrate is etched by chemical etching to form a non-equal-length line array combination. The copper foil line width is 0.15mm, the line spacing is 0.5mm, the array i...

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Abstract

The invention discloses a stealth composite material and a preparation method thereof. The stealth composite material adopts the infrared stealth layer composed of TPU composite material and its conductive material; the electromagnetic wave resonance control layer and the guide layer are composed of the FPC material with polyimide as the base material. The flow structure makes the special-shaped metal structure in the FPC form a local resonance ability for electromagnetic waves, and strengthens the loss effect of the overall absorbing material on electromagnetic waves. This scheme constructs a combination of two resonant control layers and a diversion layer, and sandwiches traditional non-ferromagnetic absorbing materials between the resonant control layer and the diversion layer to form the absorption of continuous microwave signals from the C-band to the Ka-band ; The bottom unit can isolate the external infrared radiation of the protected body. The invention realizes a compound flexible stealth material which has absorption effect on continuous radar band and insulation effect on infrared radiation.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a composite stealth material which has a broadband wave-absorbing effect on radar waves and an insulating effect on infrared radiation. More specifically, it relates to a stealth material with a flexible structure absorbing waves and isolating infrared radiation and a preparation method thereof. Background technique [0002] With the development of radar remote electronic detection technology and the wide application of other detection technologies and products, in order to deal with the problems of electromagnetic radiation, electromagnetic scattering and electromagnetic compatibility, structural absorbing materials or coated absorbing materials are used to solve related facilities The stealth problem has had some effect. Conventional microwave-absorbing materials will restrict each other in terms of thickness, density, absorption rate, and microwave-absorbing bandwidth. For ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05K9/00G02B5/00
CPCG02B5/003H05K9/0081
Inventor 秦振山肖兵佟阳
Owner 秦振山
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