Visible light high absorbability far infrared high reflection film and preparation method thereof

Abstract

The invention belongs to the field of novel nanometer materials, and particularly relates to a visible light high absorbability far infrared high reflection film. A dielectric layer and a metal nanoparticle layer are added on the basis of aluminium metal; through the contact between a metal nanometer island and the dielectric layer, the mode coupling is realized, and a plasmon oscillation cavity is generated; and by the adjustment of the thickness of the dielectric layer and the sizes of metal nanoparticles, the low reflectivity and high absorptivity characteristic of the film within the rangeof a visible light wavelength is realized, and the infrared stealth characteristic is not influenced when the lightness of the surface of the film is reduced. The absorptivity of the film within therange of visible light can reach 18.66%-59.04%, and the absorptivity of the film within the far infrared range does not exceed 1.40%-1.42%. A preparation method provided by the invention is relativelysimple, and the prepared visible light high absorbability far infrared high reflection film is excellent in parameter performance.

Description

technical field [0001] The invention belongs to the field of new nanometer materials, and specifically relates to a visible light high-absorption far-infrared high-reflection film, which has low reflectivity and high absorptivity in the visible light band and high reflectivity and low absorptivity in the far-infrared band. Background technique [0002] Coatings with high reflectivity and low absorption in the infrared band are widely used in construction, stealth, aerospace, military and other fields. This coating is mainly composed of low-emissivity coatings, generally using metal powders with high reflectivity and low absorptivity such as aluminum, titanium, copper, and silver. Aluminum metal has excellent characteristics such as corrosion resistance, good reflection performance, light weight, and low cost, and is the most commonly used low-emissivity pigment. However, it also has high reflectivity and low absorptivity in the visible light band, which makes the surface of...

AI Technical Summary

Problems solved by technology

[0006] In view of the above-mentioned problems or deficiencies, in order to solve the defects of the existing low-infrared emissivity coatings, which are complicated in preparation process and the surface is too bright, without affecting the characteristics of high reflection in the far-infrared band, the present invention provides a high absorption of visible light and high in far-infrared Reflective film, using the surface plasmon mode, by adjusting the coupling degree between the surface plasmon polarization resonance and the localized surface plasmon resonance, to improve the absorption rate of the film in the visible wavelength range

Images