Light absorption coating film as well as preparation method and application thereof

A technology of light absorption and light absorption rate, used in optics, nano-optics, optical components, etc., can solve the problems of easy degradation of coatings, complicated etching and laser treatment processes, and no wear resistance, and achieve a wide range of light absorption frequencies. , the effect of high absorption rate and low cost of raw materials

Active Publication Date: 2018-11-13
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Brushing black paint, electrochemical etching, and laser treatment are used to produce a light-absorbing layer on the surface of the material, but each has its own disadvantages: the paint is prone to degradation and is not wear-resistant, and the etching and laser treatment processes are more complicated.

Method used

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  • Light absorption coating film as well as preparation method and application thereof
  • Light absorption coating film as well as preparation method and application thereof
  • Light absorption coating film as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Embodiment 1 Preparation of light-absorbing coating

[0071] Vacuum equipment equipped with more than two magnetron sputtering target heads is used. The target materials are high-purity titanium target and high-purity aluminum target with a purity of 99.999%. The target size is titanium target: Φ100mm×10mm, aluminum target: Φ100mm×20mm . The two sputtering targets are connected to two DC power supplies respectively. The two targets are respectively inclined at 15° and point to the coating area together; the distance between the target and the substrate is 10 cm.

[0072] In order to ensure that the surface of the sample is clean, the substrate can be washed with ultrasonic water and absolute ethanol before coating.

[0073] 1 # sample preparation

[0074] With copper as the substrate, place the substrate copper in the coating area, and apply the vacuum degree of the vacuum device to 7.0×10 -4 Pa, feed 99.999% high-purity argon gas at a flow rate of 40 sccm until ...

Embodiment 2

[0088] Structural characterization of embodiment 2 light-absorbing coating

[0089] with 1 # The sample is typical, and its cross-sectional morphology is characterized by scanning electron microscopy, such as figure 1 (b) and figure 1 As shown in (c), figure 1 (b) The columnar crystal structure is clearly visible, the grain width is 30-50nm, the thickness is 800-900nm, and the columnar crystal structure with a grain width of about 50nm and a thickness of about 900nm accounts for a large proportion, about 70%-90 %.

[0090] The structure was characterized by transmission electron microscopy, as figure 2 as shown, figure 2 In (a), the nano-layered structure at the bottom of the sample and the columnar crystal structure outside can be observed. The columnar crystal grains are about 50nm wide and about 900nm high; figure 2 In (b), the subgrain boundary structure inside the columnar grain can be observed, and the width of the subgrain boundary is about 0.237nm.

[0091] T...

Embodiment 3

[0102] Performance characterization of embodiment 3 light-absorbing coating

[0103] image 3 Schematic diagram of the light absorption principle of the light-absorbing coating of the present application, (a) is a schematic diagram of the process of inducing incident light to the interior of the coating on the coating surface, and (b) a schematic diagram of the process of light multiple reflections between grain boundaries to improve absorption.

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Abstract

The invention discloses a light absorption coating film. The light absorption coating film is a titanium aluminum nitrogen coating film and comprises a bottom layer and an outer layer, wherein the bottom layer is of a nano-layered structure, the outer layer is of a columnar crystal structure, the top end of the columnar crystal structure is a conical surface, in the wavelength range of the light wave ranging from 200 nm to 2500 nm, the average light absorption rate alpha of the light absorption coating film is not less than 0.89, after the TiAlON or TiO2 or SiO2 antireflection layer is added on the outer layer of the light absorption coating film, the average light absorption rate alpha of the light absorption coating film in the wavelength range of the light wave ranging from 200 nm to 2500 nm is not less than 0.95, the light absorption coating film has the advantages that the light absorption frequency range is wide, the absorption rate is high, the coating physical and chemical properties are stable and the like. The invention further discloses a preparation method and application of the light absorption coating film. According to the method, the raw material cost is low, a substrate and the coating process do not need to undergo other special treatment, the process is simple and convenient, large-area preparation can be realized, the light absorption coating film prepared by the method is controllable in structure, and coating on the surfaces of different materials can be realized.

Description

technical field [0001] The application relates to a light-absorbing coating, its preparation method and application, and belongs to the fields of materials and physical vapor deposition. Background technique [0002] High-performance light-absorbing films can be widely used in solar-to-thermal conversion, thermal management, internal extinction of optical instruments, etc. Brushing black paint, electrochemical etching, and laser treatment are used to produce a light-absorbing layer on the surface of the material, but each has its own disadvantages: the paint is prone to degradation and is not wear-resistant, and the etching and laser treatment processes are more complicated. Magnetron sputtering Ti-based coating is a common method for industrial production of light-absorbing films, which can have good light-absorbing properties in a certain spectral range. However, for light absorption in the full-band visible light range, a three-dimensional structure is usually required. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/06C23C14/08C23C14/10C23C14/35
CPCC23C14/0036C23C14/0641C23C14/0676C23C14/083C23C14/10C23C14/352C23C14/3414C23C14/3464C23C16/34G02B5/003G02B5/208G02B1/118B82Y20/00G02B1/113
Inventor 宋振纶阿卜杜拉·加法尔·瓦图丁雪峰杨丽景郑必长姜建军胡方勤
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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