Stealth material compatible with selective infrared radiation and radar absorption and preparation method thereof

A technology of infrared radiation and stealth materials, applied in protective equipment, offensive equipment, instruments, etc., can solve the problem of not considering heat dissipation efficiency, achieve good infrared and radar compatible stealth, easy to large-scale production and application, easy to operate.

Active Publication Date: 2022-01-04
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the stealth of the above-mentioned patents in the infrared band is realized by reducing the emissivity of the infrared full-band, without considering the problem of low heat dissipation efficiency caused by the low emission of the full-band, resulting in the possibility of re-exposure

Method used

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  • Stealth material compatible with selective infrared radiation and radar absorption and preparation method thereof
  • Stealth material compatible with selective infrared radiation and radar absorption and preparation method thereof
  • Stealth material compatible with selective infrared radiation and radar absorption and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] like figure 1Shown, a selective infrared radiation is compatible with stealth radar absorbing material, the second composite selective infrared radiation function radar absorbing layer 1 and the functional layers. Selective infrared radiation comprises a functional layer on a polyimide substrate and a polyimide substrate alternately deposited, cyclical pattern the silver thin film layer thickness of the layer 4 and the germanium film layer, four-layer film were 40nm, 610nm, 10nm, 340nm; functional radar absorbing layer 2 of a conductive layer are sequentially Al, 1.2mm thick base layer of foamed medium, the foamed medium frequency selective top layer and the surface of the laminated thickness of 0.2mm plus composition, frequency selective surface side barrier layer to 35Ω / □.

[0036] Preparation selective infrared radiation according to the present embodiment is compatible with stealth radar absorbing material comprising the steps of:

[0037] (1) using electron beam evap...

Embodiment 2

[0043] A method of selectively absorbing infrared radiation is compatible with the radar camouflage material, selective infrared radiation from the second composite layer 1 and the functional radar absorbing functional layers. Selective infrared radiation function layer comprises a polyimide substrate 1 and a cyclical pattern layer 6 and the silver thin film layer of germanium thin film layer on the polyimide substrate alternately deposited, the layer thickness of the thin film layer 6 were 40nm, 500nm, 12nm, 360nm, 10nm, 300nm; functional radar absorbing layer 2 of a conductive layer are sequentially Al, 1.6mm thick base layer of foamed medium, the foamed medium frequency selective top layer and the laminated layer surface composition plus 0.4mm thick, frequency selective surface side barrier layer was 50Ω / □.

[0044] Preparation selective infrared radiation according to the present embodiment is compatible with stealth radar absorbing material comprising the steps of:

[0045]...

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Abstract

The invention discloses a stealth material compatible with selective infrared radiation and radar absorbing. The stealth material includes a radar absorbing functional layer and a selective infrared radiation functional layer superimposed on the radar absorbing functional layer. It is characterized in that: The selective infrared radiation functional layer includes a polyimide substrate and alternately deposited on the surface of the polyimide substrate, a silver thin film layer and a germanium thin film layer in a periodic pattern; the radar absorbing functional layer is multi Layer structure, the multi-layer structure sequentially includes a conductive layer, a bottom foam medium layer, a frequency selective surface layer and a top foam medium layer from bottom to top. The present invention also correspondingly provides a preparation method of the above-mentioned cloaking material. The stealth material of the present invention can achieve low emissivity in the 3.0μm-5.0μm and 8.0μm-14.0μm bands, high emissivity in the 5.0μm-8.0μm band, and low reflectivity in the 8.0GHz-18.0GHz.

Description

Technical field [0001] The invention belongs to the field of functional materials, and more particularly to a stealth material and a method of preparation thereof. Background technique [0002] With the rapid development of multi-band detection technology, single-band invasive materials such as visible light, infrared or radar can no longer meet the stealth needs of equipment. In order to reduce the possibility of equipment discovery, the development of infrared and radar compatible invasive materials is an inevitable trend of stealth technology development. [0003] Infrared stealth is to eliminate or reduce the difference in radiation characteristics of two atmospheres (3.0 μm to 5.0 μm, 8.0 μm ~ 14.0 μm) in the background. At present, the use of low-emission rate infrared stealth materials is still the most important way in infrared stealth. Traditional infrared low emissivity materials have a low emissivity throughout the infrared band, covering the 3.0 μm to 5.0 μm and 8.0 μ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/00H01Q17/00F41H3/00G02B1/10
CPCG02B5/003H01Q17/00H01Q17/007F41H3/00G02B1/10
Inventor 刘东青程海峰彭亮彭任富
Owner NAT UNIV OF DEFENSE TECH
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