Stealth composite material and preparation method thereof

A composite material and slurry technology, used in optics, instruments, electrical components, etc., can solve the problems of large thickness and high processing difficulty of absorbing materials, and achieve the effect of overcoming easy oxidation, solving high prices and good electrical conductivity.

Active Publication Date: 2019-11-29
秦振山 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The absorbing materials prepared by these materials and methods have the disadvantages of large thickness and high pro

Method used

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  • Stealth composite material and preparation method thereof
  • Stealth composite material and preparation method thereof
  • Stealth composite material and preparation method thereof

Examples

Experimental program
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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 is an infrared stealth layer composed of a TPU composite material and a conductivematerial of the TPU composite material. An electromagnetic wave resonance control layer and a flow guide layer are formed by adopting an FPC material by taking polyimide as a base material, and a special-shaped metal structure in the FPC forms a local resonance capability on electromagnetic waves by adopting an unequal-strip-shaped combination and a trapezoidal flow guide structure, so that the loss effect of the whole wave absorbing material on the electromagnetic waves is enhanced. According to the scheme, a combination of two resonance control layers and a diversion layer is constructed, and a traditional wave-absorbing material mainly comprising non-ferromagnetism is clamped between the resonance control layers and the diversion layer, so that absorption of continuous microwave signals from a C waveband to a Ka waveband is formed; and a bottom layer unit can isolate external infrared radiation of the protected body. The composite flexible stealth material has an absorption effecton continuous radar bands and an isolation effect on infrared radiation is achieved.

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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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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