Preparation method for ultra-black coating with high ultraviolet band absorption

A technology of ultraviolet band and black coating, applied in coating, metal material coating process, alkali metal silicate coating, etc., can solve the problem of low absorption rate in ultraviolet band

Active Publication Date: 2021-08-13
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the technical problem that the ultra-black coating generally has a low absorption rate in the ultraviolet band in t...

Method used

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  • Preparation method for ultra-black coating with high ultraviolet band absorption
  • Preparation method for ultra-black coating with high ultraviolet band absorption
  • Preparation method for ultra-black coating with high ultraviolet band absorption

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Experimental program
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Effect test

Embodiment 1

[0026] Embodiment 1: A kind of preparation method of the ultra-black coating with ultraviolet band high absorption is realized through the following steps in the present embodiment:

[0027] Take 100g spray liquid as an example:

[0028] Step 1. After mixing 30g of potassium silicate, 70mL of water and 0.2g of additive Tego 280, add zirconium beads with a diameter of 1mm. The amount of zirconium beads is one-third of the liquid volume. Stir and disperse evenly and divide into five equal parts. Separate and then add different mass fractions of high-performance carbon black, ultrasonically disperse for 3 minutes, continue to stir for 3 hours, filter through a filter cloth, stir slowly (500rpm) until the suspension is stable and does not precipitate (it takes 0.5h), and spray coatings with different concentrations are obtained. Liquid, the mass fraction of carbon black in the spraying liquid is 0.5%, 0.4%, 0.3%, 0.2%, 0.1% respectively;

[0029] Step 2, and then put into the spr...

Embodiment 2

[0036] Embodiment 2: A kind of preparation method of the ultra-black coating with ultraviolet band high absorption is realized through the following steps in the present embodiment:

[0037] Take 100g spray liquid as an example:

[0038] Step 1. After mixing 30g of potassium silicate, 70mL of water and 0.2g of additive Tego 280, add zirconium beads with a diameter of 1mm. The amount of zirconium beads is one-third of the liquid volume. Stir and disperse evenly and divide into five equal parts. Separate and then add different mass fractions of high-performance carbon black, ultrasonically disperse for 5 minutes, continue to stir for 3 hours, filter through a filter cloth, stir slowly (500rpm) until the suspension is stable and does not precipitate (it takes 0.5h), and spray coatings with different concentrations are obtained. Liquid, the mass fraction of carbon black in the spraying liquid is 1.0%, 0.8%, 0.6%, 0.4%, 0.2% respectively;

[0039] Step 2, and then put into the spr...

Embodiment 3

[0046] Embodiment 3: a kind of preparation method of the ultra-black coating with ultraviolet band high absorption in the present embodiment is realized through the following steps:

[0047] Take 100g spray liquid as an example:

[0048] Step 1. After mixing 30g of potassium silicate, 70mL of water and 0.2g of additive Tego 280, add zirconium beads with a diameter of 1mm. The amount of zirconium beads is one-third of the liquid volume. Stir and disperse evenly and divide into five equal parts. Separate and then add different mass fractions of high-performance carbon black, ultrasonically disperse for 4 minutes, continue to stir for 3 hours, filter through a filter cloth, stir slowly (400rpm) until the suspension is stable and does not precipitate (it takes 0.5h), and spray coatings with different concentrations are obtained. Liquid, the mass fraction of carbon black in the spraying liquid is 0.5%, 0.4%, 0.3%, 0.2%, 0.1% respectively;

[0049] Step 2, and then put into the spr...

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Abstract

The invention discloses a preparation method for an ultra-black coating with high ultraviolet band absorption, and belongs to the field of stray light suppression of a space optical system. According to the method, the problem that the ultraviolet band absorptivity is generally low when an ultra-black coating is prepared through an existing conventional spraying process is solved. According to the method, carbon black is used as a black coloring agent, a controllable structure film layer with concentration gradient transition is constructed by regulating and controlling the mass fraction of the carbon black coloring agent in a multi-layer spraying process, and a TiO2 film is deposited on the surface of the ultra-black coating by adopting an atomic layer deposition technology. According to the method, the ultraviolet band absorptivity of ultra-black materials is further improved on the basis of not influencing the stray light suppression structure on the surface of the ultra-black coating by utilizing the high shape retention characteristic of the atomic layer deposition technology, and the application space of the ultra-black coating in the field of space optics is expanded.

Description

technical field [0001] The invention belongs to the field of suppressing stray light of a space optical system. Background technique [0002] Space optical loads such as optical cameras, detectors, and solar energy conversion devices have adverse effects on performance due to the incidence of stray light from space and unnecessary reflection of incident light by interfaces. It will cause a decrease in the signal-to-noise ratio, sensitivity and reliability of the optical device. In order to improve the performance of space optical payloads, it is necessary to eliminate the adverse effects of stray light on them. As the most common light-absorbing material, ultra-black coating can effectively reduce the reflection that interferes with the imaging of optical loads within a certain range, and absorb stray light on the surface of the material to a great extent. Therefore, the development of highly light-absorbing ultra-black coatings that can be applied to space optical systems...

Claims

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Application Information

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IPC IPC(8): B05D1/02B05D1/38B05D7/24C09D1/04C09D7/61C23C16/40C23C16/455
CPCB05D7/24B05D7/586B05D1/02B05D1/38C09D1/04C09D7/61C23C16/45525C23C16/405
Inventor 吴晓宏熊启阳卢松涛李杨秦伟洪杨康红军
Owner HARBIN INST OF TECH
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