Infrared and radar compatible stealth window glass with sound insulation and heat insulation functions

A technology of window glass and outer glass, applied in the field of wave absorbing materials, can solve the problems of inability to achieve sound insulation and heat insulation, and inability to meet higher requirements, and achieve the effects of reducing the probability of detection, efficient reflection, and preventing internal and external heat exchange

Pending Publication Date: 2021-11-19
CHINA ACADEMY OF SPACE TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the infrared stealth and radar stealth capabilities of this structure are still insufficient, and cannot meet higher requirements or other application scenarios, nor can it achieve the function of sound insulation and heat insulation.

Method used

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  • Infrared and radar compatible stealth window glass with sound insulation and heat insulation functions
  • Infrared and radar compatible stealth window glass with sound insulation and heat insulation functions
  • Infrared and radar compatible stealth window glass with sound insulation and heat insulation functions

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Embodiment approach

[0036] In the present invention, the microwave frequency selective surface structure array 11 is a graphic structure array formed by depositing the first transparent conductive film material on the outer surface of the outer glass 1. The graphic structure is a periodic array of a specific shape, and the shape can be square, circular, Regular or irregular structures such as rectangles, the structure array has selective permeability to microwaves, and can make the 5-20GHz frequency band have high transmittance. According to an embodiment of the present invention, the period of the graphic structure array is 0.5 mm, and the graphic structure is a square. The first transparent conductive film material is indium tin oxide or zinc aluminum oxide, its square resistance is 8-15Ω / sq, and its thickness is 200-250nm. The conductive film with this parameter has high conductivity, so as to ensure the surface of the window Infrared emissivity is less than 0.25.

[0037] The microwave reson...

Embodiment 1

[0047] combine figure 1 As shown, the outer glass 1 and the inner glass 2 in this embodiment are made of quartz glass, both of which have a dielectric constant of 3.75. Wherein the thickness of the outer glass 1 is 3 mm, the thickness of the inner glass 2 is 1.5 mm, and the thickness of the vacuum layer is 2.7 mm. The microwave frequency selective surface structure array 11 and the microwave resonant structure array are prepared on the outer surface and the inner surface of the outer glass 1 by photolithography process and wet etching process respectively. like Figure 6 As shown, the visible light average transmittance of the window ratio in this embodiment is higher than 60%.

[0048] In this embodiment, the configuration of the microwave frequency selective surface structure array is as follows figure 2 As shown, the structure is a square array. Wherein the structural parameters g1=0.1, w=0.45. This structural array can ensure that the microwave transmittance of 5-20G...

Embodiment 2

[0052] combine figure 1 As shown, the outer glass 1 and the inner glass 2 in this embodiment are made of organic glass, and the dielectric constants are both 2.45. The thickness of the outer glass 1 is 2.8 mm, the thickness of the inner glass 2 is 1.5 mm, and the thickness of the vacuum layer is 2.6 mm. The microwave frequency selective surface structure array 11 and the microwave resonant structure array are respectively prepared on the outer surface and the inner surface of the outer glass 1 by laser etching.

[0053] In this embodiment, the configuration of the microwave frequency selective surface structure array is as follows Figure 4 As shown, the structure is a regular hexagonal array. Wherein the structural parameters g2=0.008, d=0.2. This structural array can ensure that the microwave transmittance of 5-20GHZ is greater than 98%. Indium tin oxide (ITO) is selected as the material of the transparent film, its square resistance is 8Ω / sq, and the film thickness is 2...

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Abstract

The invention relates to infrared and radar compatible stealth window glass with sound insulation and heat insulation functions, which comprises outer-layer glass and inner-layer glass, wherein a vacuum layer is arranged between the outer-layer glass and the inner-layer glass, a microwave frequency selective surface structure array is arranged on the outer surface of the outer-layer glass, a microwave resonance absorption structure array is arranged on the inner surface of the outer-layer glass, and an electromagnetic reflecting film is arranged on the inner surface of the inner-layer glass. The window glass integrates a transparent supporting structure and a compatible stealth function, wide-spectrum efficient microwave absorption and low infrared emissivity can be achieved on the basis of the window glass, the microwave absorption range can cover 5-20 GHz, and the absorption efficiency is greater than 0.9. The infrared emissivity of the surface of the glass can be as low as 0.23, and the thermal radiation quantity of a target can be remarkably reduced, so that the probability of being detected is reduced. In addition, the visible light transmittance of the window glass is 60% or above. Meanwhile, based on the vacuum spacing layer in the structure, the window glass has sound insulation, noise reduction and heat insulation capacities.

Description

technical field [0001] The invention belongs to the field of wave-absorbing materials, and relates to an infrared and radar-compatible stealth window glass with the function of sound insulation and heat insulation. Background technique [0002] On today's battlefield, with the diversification and intelligence of detection methods, the pre-war survivability of weapons and equipment is severely tested. Multi-band joint detection has become an inevitable trend in the development of modern military reconnaissance methods, among which infrared and radar detection methods are currently the two most important target reconnaissance technologies. Therefore, the development of materials capable of both radar stealth and infrared stealth will be more in line with actual needs, and ultimately improve the camouflage and survivability of military targets when multiple detection methods are used in combination. [0003] Most of the existing technologies use composite coatings to achieve c...

Claims

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Application Information

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IPC IPC(8): C03C17/23C03C17/22C03C17/06C03C17/34C03C17/36F41H3/00
CPCC03C17/23C03C17/22C03C17/06C03C17/006C03C17/3417C03C17/3441C03C17/36C03C17/3644C03C17/3676F41H3/00C03C2217/231C03C2217/23C03C2217/256C03C2217/28C03C2217/40C03C2217/90C03C2217/948C03C2217/944C03C2218/365
Inventor 肖林杨昌常慧聪
Owner CHINA ACADEMY OF SPACE TECHNOLOGY
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