Solar selective absorbing coating as well as preparation method and application thereof

An absorption coating, selective technology, applied in the direction of coating, metal material coating process, layered products, etc., can solve the problems of poor thermal stability, low use temperature, etc., to achieve the best thermal stability, cost economy, preparation Simple and clean method

Active Publication Date: 2012-07-25
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

[0007] The purpose of the present invention is to overcome the existing low temperature (below 200°C) and poor thermal stability of existing solar selective absorbing coatings, and provide a solar selective absorbing coating that can be used at medium and high temperatures and its preparation method

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  • Solar selective absorbing coating as well as preparation method and application thereof
  • Solar selective absorbing coating as well as preparation method and application thereof

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preparation example Construction

[0068] Preparation method of solar selective absorbing coating

[0069] The preparation method of the solar energy selective absorption coating of the present invention comprises the following steps:

[0070] (a) forming a TiAlN film layer as an absorber layer on a substrate;

[0071] (b) forming SiO on the absorber layer 2 The thin film layer acts as an anti-reflection layer.

[0072] The method for forming the TiAlN thin film layer on the substrate in the step (a) can adopt methods commonly used in the art, such as multi-arc ion plating, evaporation, or DC magnetron sputtering.

[0073] SiO is formed on the absorber layer in the step (b) 2 The method of thin film layer can adopt the method commonly used in this field, such as radio frequency magnetron sputtering method, pulse reaction magnetron sputtering method, chemical vapor deposition method, oxidation method, sol-gel method, or liquid phase deposition method.

[0074] Preferably, the preparation method of the solar ...

Embodiment 1

[0124] Preparation of Solar Selective Absorbing Coatings

[0125] A polished copper sheet was used as the base material, ultrasonically cleaned in acetone for 30 minutes, dried and placed in the sample stage of the chamber of the magnetron sputtering equipment.

[0126] Use mechanical pump and molecular pump to vacuumize the chamber, when the vacuum degree of the chamber reaches 7×10 -4 After Pa, pass high-purity argon gas into the chamber with a flow rate of 20 sccm, adjust the speed of the sample stage when the air pressure in the chamber is 0.1Pa, and turn on the ion source with a voltage of 150V to clean the surface of the substrate material by ion bombardment.

[0127] After cleaning for 20 minutes, high-purity argon and high-purity nitrogen were introduced into the chamber, the flow rate was 30 sccm and 5 sccm, and the sputtering pressure was 0.1 Pa, and the preparation of TiAlN thin film was carried out: using TiAl alloy target material, applied on two The power on the...

Embodiment 2

[0133] Preparation of Solar Selective Absorbing Coatings

[0134] Polished stainless steel was used as the substrate material, ultrasonically cleaned in acetone for 30 minutes, dried and placed in the sample stage of the chamber of the magnetron sputtering equipment.

[0135] Use mechanical pump and molecular pump to vacuumize the chamber, when the vacuum degree of the chamber reaches 7×10 -4 After Pa, pass high-purity argon gas into the chamber with a flow rate of 20 sccm, adjust the speed of the sample stage when the air pressure in the chamber is 0.1 Pa, and turn on the ion source with a voltage of 200V to clean the surface of the substrate material by ion bombardment.

[0136] After cleaning for 20 minutes, high-purity argon and high-purity nitrogen were introduced into the chamber, the flow rate was 30 sccm and 5 sccm, and the sputtering pressure was 0.1 Pa, and the preparation of TiAlN thin film was carried out: using TiAl alloy target material, applied on two The power...

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Abstract

The invention discloses a solar selective absorbing coating as well as a preparation method and application thereof. The solar selective absorbing coating sequentially comprises a substrate layer, a TiAlN film absorbing layer and a SiO2 film antireflection layer from bottom to top; preferably, the TiAlN film absorbing layer is formed on a substrate by adopting a reaction magnetron sputtering method; and the SiO2 film antireflection layer is formed on the absorbing layer by adopting the reaction magnetron sputtering method. The preparation technology disclosed by the invention is clean, simple and easy to control; and the prepared coating has high yield within the solar spectral range and low emissivity in an intermediate far infrared area. In addition, the solar selective absorbing coating has medium-high temperature stability, can be applied to the fields of a vacuum or non-vacuum flat plate heat collector, a building integrated heat collector and the like, and meets the use demand of a solar thermal collector at the medium-high temperature.

Description

technical field [0001] The invention belongs to the field of solar photothermal application materials, and in particular relates to a solar selective absorption coating and a preparation method and application thereof. Background technique [0002] The technology of converting solar radiation energy into thermal energy through conversion devices is currently the most active application of solar heat collectors that have formed industrialization, such as solar water heaters. In the research and utilization of solar light-to-heat conversion, the technology of solar spectrum selective absorption materials, especially the technology of solar selective absorption coating is an extremely important key technology in the research of solar collectors, and it is also the key to improve the efficiency of light-to-heat conversion. important research direction. [0003] Solar radiant energy is mainly concentrated in the visible light and near-infrared wavelength range (0.3-2.5μm), and f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B9/04C23C14/06C23C14/10C23C14/35C23C28/04
Inventor 宋振纶余超郑必长冒守栋
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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