Medium-high-temperature solar selective absorbing coating and preparation method thereof

A technology for absorbing coating and solar energy, applied in coating, metal material coating process, ion implantation plating, etc., can solve the problem of low thermal efficiency of coating, and achieve high absorption efficiency, low interface stress, and excellent spectral selectivity. Effect

Pending Publication Date: 2018-08-24
(CNBM) BENGBU DESIGN & RES INST FOR GLASS IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of low thermal efficiency of the existing medium and high temperature solar selective coating, and to provide a medium and high temperature solar selective absorption coating and its preparation method

Method used

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  • Medium-high-temperature solar selective absorbing coating and preparation method thereof
  • Medium-high-temperature solar selective absorbing coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Select copper foil with a thickness of 0.3mm;

[0029] (2) Cleaning of the surface of the metal substrate: Put the copper foil into the ultrasonic cleaning machine, first use acetone for 20 minutes, then use alcohol for 20 minutes, and finally use deionized water for 20 minutes, and use high-pressure N 2 blow dry;

[0030] (3) Take out the copper foil and put it into the magnetron sputtering equipment to deposit the infrared reflective layer Al film. The preparation process parameters are as follows:

[0031] Target material: Al target (4N); background vacuum ≤9×10 -4 Pa; working pressure: 5×10 -1 Pa; sputtering power: 80W; sputtering process gas Ar flow rate: 30sccm; deposition thickness: 30nm, to obtain a copper foil coated with an infrared reflective layer Al film;

[0032] (4) The absorption layer TiN film is deposited in the magnetron sputtering equipment, and the preparation process parameters are as follows:

[0033] Target material: Ti target (4N); backg...

Embodiment 2

[0045] (1) Select aluminum foil with a thickness of 0.2mm;

[0046] (2) Cleaning of the surface of the metal substrate: Put the aluminum foil into the ultrasonic cleaning machine, first use acetone for 20 minutes, then use alcohol for 20 minutes, and finally use deionized water for 20 minutes, and use high-pressure N 2 blow dry;

[0047] (3) Take out the aluminum foil and put it into the magnetron sputtering equipment to deposit the infrared reflective layer Ag film. The preparation process parameters are as follows:

[0048] Target material: Ag target (4N); background vacuum ≤9×10 -4 Pa; working pressure: 5×10 -1 Pa; sputtering power: 80W; sputtering process gas Ar flow rate: 30sccm; deposition thickness: 25nm, to obtain an aluminum foil coated with an infrared reflective Ag film;

[0049] (4) The absorption layer TiN film is deposited in the magnetron sputtering equipment, and the preparation process parameters are as follows:

[0050] Target material: Ti target (4N); ...

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Abstract

The invention relates to a medium-high-temperature solar selective absorbing coating and a preparation method thereof. The medium-high-temperature solar selective absorbing coating comprises an existing metal substrate. The medium-high-temperature solar selective absorbing coating is characterized in that the metal substrate comprises an infrared reflecting layer, an absorbing layer and an antireflection layer from bottom to top; the infrared reflecting layer is a coating of any one of Al, Au, Ag and Ni, the absorbing layer sequentially comprises a TiN film and a TiCrN film from bottom to top,and the antireflection layer sequentially comprises a Cr2O3 film, an AlN film and an Al2O3 film from bottom to top; and film coating is carried out through a magnetron sputtering method. The medium-high-temperature solar selective absorbing coating has the beneficial effects that 1, the prepared coating has the characteristics of high absorbing efficiency, low emissivity and good heat stability;2, the ratio of the solar spectrum emissivity alpha to the emissivity epsilon (T) is high, and the coating is suitable for being applied to medium-high temperature of 200 DEG C or above; and 3, the manufacturing process is simple and convenient.

Description

technical field [0001] The invention belongs to the technical field of photothermal conversion and utilization of solar energy, and relates to a medium-high temperature solar selective absorption coating and a preparation method thereof. Background technique [0002] The solar selective absorption coating is a functional film with high absorption rate in the visible-near-infrared band (300-2500nm) and low emissivity in the infrared band (2500-20000nm). It is used in solar collectors to improve photothermal The key to conversion efficiency. With the continuous development of solar heat utilization requirements and technology, the application range of solar collectors has been developed from low temperature applications (≤200°C) to medium temperature applications (200°C-400°C) and high temperature applications (≥400°C), in order to continuously meet The use requirements of medium and high temperature applications such as seawater desalination and solar power generation. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/35C23C14/16C23C14/08C23C14/06
CPCC23C14/0641C23C14/081C23C14/083C23C14/165C23C14/35
Inventor 杨勇姚婷婷金克武李刚沈洪雪彭赛奥王天齐杨扬金良茂马立云
Owner (CNBM) BENGBU DESIGN & RES INST FOR GLASS IND CO LTD
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