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A kind of broadband optical absorber and coating preparation method

An optical absorption, wide-band technology, applied in the field of materials, can solve problems such as performance and range of use

Active Publication Date: 2022-03-08
CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The absorption index of the existing light absorber changes with the wavelength of the radiation wave, resulting in a certain selectivity in the absorption of the material, and the performance and application range are affected

Method used

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  • A kind of broadband optical absorber and coating preparation method
  • A kind of broadband optical absorber and coating preparation method
  • A kind of broadband optical absorber and coating preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031]The object of the present invention is to provide a kind of light-absorbing agent and the preparation method of coating thereof with broadband absorption characteristic from visible light to infrared band, it is characterized in that, comprises the following steps: 1) take by weighing 4mmol cobalt chloride and 48mmol hexamethylene The base tetramine was dissolved in 800ml of mixed solvent composed of deionized water and absolute ethanol, and the volume ratio of deionized water and absolute ethanol was 9:1; stirred by a magnetic stirrer for 15min until the precursor powder was completely dissolved, and then transferred to In the three-necked flask, the mixture was heated to 90°C under magnetic stirring, and kept at this temperature for 1 hour;

[0032] 2) The precipitate obtained in step 1) was collected by vacuum filtration, washed alternately with deionized water and absolute ethanol three times each, and dried in an oven at 60° C. for 5 hours to obtain nano-sized cobalt...

Embodiment 2

[0040] 1) Weigh 4mmol of nickel chloride and 48mmol of hexamethylenetetramine and dissolve in 800ml of mixed solvent composed of deionized water and absolute ethanol, the volume ratio of deionized water and absolute ethanol is 9:1; Stir for 15 minutes until the precursor powder is completely dissolved, then transfer it to a three-necked flask, heat the mixture to 100°C under magnetic stirring, and keep it at this temperature for 1 hour;

[0041] 2) The precipitate obtained in step 1) was collected by vacuum filtration, washed alternately with deionized water and absolute ethanol 3 times each, and dried in an oven at 60° C. for 5 hours to obtain nano-sized nickel hydroxide powder;

[0042] 3) Weigh 10 g of nickel hydroxide obtained in step 2) into a quartz boat, and vacuumize for 10 minutes to maintain an oxygen-free environment in the quartz tube. Then pass in the mixed gas of argon and hydrogen, the flow rate of argon gas is controlled at 100 sccm, the flow rate of hydrogen g...

Embodiment 3

[0049] 1) Weigh 4mmol ferric chloride and 48mmol hexamethylenetetramine and dissolve in 800ml of mixed solvent composed of deionized water and absolute ethanol, the volume ratio of deionized water and absolute ethanol is 9:1; Stir for 15 minutes until the precursor powder is completely dissolved, then transfer it to a three-necked flask, heat the mixture to 110°C under magnetic stirring, and keep it at this temperature for 1 hour;

[0050] 2) The precipitate obtained in step 1) was collected by vacuum filtration, washed alternately with deionized water and absolute ethanol three times each, and dried in an oven at 60° C. for 5 hours to obtain nanoscale iron hydroxide powder;

[0051] 3) Weigh 10 g of ferric hydroxide obtained in step 2) and put it into a quartz boat, and vacuumize for 10 minutes to maintain an oxygen-free environment in the quartz tube. Then pass in the mixed gas of argon and hydrogen, the flow rate of argon gas is controlled at 100 sccm, the flow rate of hydr...

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Abstract

The invention discloses a preparation method of a broadband optical absorber and a coating. Nanoscale metal oxide is used as the core material, and a layer of graphene wall is deposited on the surface as the shell material, so as to obtain the core-shell composite metal oxide powder covered by the graphene wall. The huge specific surface area of ​​the graphene wall based on the petal-like microstructure can effectively improve the absorption characteristics of the coating by effectively increasing the number of reflection and absorption of radiation waves inside the coating. At the same time, through the synergistic effect with metal oxides, the optical absorption properties of the coating from visible light to infrared bands can be further improved. The invention utilizes the microwave plasma enhanced chemical vapor deposition technology to prepare the graphene wall with a petal-like microstructure, which can effectively shorten the time for growing the graphene wall and increase the output per unit time. The core-shell type composite metal oxide powder coated with graphene walls prepared by the invention can be popularized and applied as a new type of high-efficiency optical absorber.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a preparation method of a wide-band optical absorber from visible light to infrared bands and a coating. Background technique [0002] According to the basic concept of black body expounded by Kirchhoff and the black body radiation law established by Planck, an ideal absorbing coating can absorb all the light radiated to the surface of the material, and there is no reflection or transmission. The high-absorbing coating can effectively reduce the adverse reflection of the material surface, and can absorb the scattered light on the surface of the material to a great extent. It has important application value in the fields of new pyroelectric sensors, thermal detectors, optical instrument structural components, and solar energy conversion devices. . Coatings for preparing highly absorbing coatings usually consist of an optical absorber as a base material and a binder ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D5/32C09D183/04
CPCC09D5/32C09D183/04C08K2003/2289C08K2201/011C08K9/10C08K3/22C08K3/042
Inventor 朴明星李朝龙王啸史浩飞
Owner CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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