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High-temperature-resistant solar energy selective absorbing coating with surface textured metal Mo being absorbing layer and preparation method thereof

A surface texture and absorbing coating technology, which is applied in the field of solar thermal utilization and thermal power generation, can solve the problems of complex coating production process and cost increase, and achieve the effects of expanding the scope of use, low production cost and short production cycle

Inactive Publication Date: 2016-03-09
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the doping system complicates the coating production process and increases the cost

Method used

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  • High-temperature-resistant solar energy selective absorbing coating with surface textured metal Mo being absorbing layer and preparation method thereof
  • High-temperature-resistant solar energy selective absorbing coating with surface textured metal Mo being absorbing layer and preparation method thereof
  • High-temperature-resistant solar energy selective absorbing coating with surface textured metal Mo being absorbing layer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Treatment of the substrate of the heat absorber: a polished stainless steel sheet with a roughness value of 1 nm is selected as the substrate of the heat absorber. Before use, wipe the surface with a cotton ball to remove impurities attached to the surface, then use stainless steel sheets to ultrasonically clean them in acetone and ethanol solvents for 20 minutes, dry them with nitrogen, and store them in a vacuum chamber for later use;

[0025] (2) Preparation of the absorbing layer: the metal Mo target with a purity of 99.99% was used as the target material, and the absorbing layer was prepared on the stainless steel substrate by DC magnetron sputtering. After installing the target, pre-pump the vacuum chamber to a background vacuum of 3.0E -6 Torr, then open the half-open valve, the argon gas fed into the vacuum chamber in pressure mode is 18mTorr, turn on the power supply of the metal Mo target, and adjust the sputtering power of the metal Mo target to 1.09W / cm ...

Embodiment 2

[0029] (1) Treatment of the substrate of the heat absorber: a polished stainless steel sheet with a roughness value of 1 nm is selected as the substrate of the heat absorber. Before use, wipe the surface with a cotton ball to remove impurities attached to the surface, then use a stainless steel sheet to ultrasonically clean it in acetone and ethanol solvents for 20 minutes, dry it with nitrogen, and store it in vacuum until use;

[0030] (2) Preparation of the absorption layer: The metal Mo target with a purity of 99.99% was used to prepare the absorption layer on the stainless steel substrate by DC magnetron sputtering. After the target is installed, pre-pump the vacuum chamber to a background vacuum of 2.8E -6 Torr, then open the half-open valve, use the pressure mode, the argon gas flowing into the vacuum chamber is 19mTorr, turn on the power supply of the metal Mo target, and adjust the sputtering power of the metal Mo target to 1.09W / cm -2 , reduce the intake of argon to...

Embodiment 3

[0034](1) Treatment of the base of the heat absorber: the same as in Example 1.

[0035] (2) Preparation of absorbing layer: Same as Example 1.

[0036] (3) Preparation of the anti-reflection layer: SiO with a purity of 99.99% is used 2 As the target, the antireflection layer was prepared by radio frequency magnetron sputtering. After the absorption layer is prepared, turn off the metal Mo target power, turn on the SiO 2 target power supply, adjust the SiO 2 The sputtering power density of the target is 6.14W / cm -2 , the flow rate of the argon gas is always kept in the pressure mode of 3mTorr, and the anti-reflection layer is prepared on the absorbing layer by radio frequency magnetron sputtering, with a thickness of 76nm.

[0037] The performance of the solar selective absorbing coating is as follows: under the condition of air quality factor AM1.5, the absorptivity of the coating is 0.90, and the emissivity is 0.07. Carry out vacuum heat treatment at 2×10 -4 Under the ...

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Abstract

The invention discloses a high-temperature-resistant solar energy selective absorbing coating with surface textured metal Mo being an absorbing layer and belongs to the technical field of solar energy utilization. According to the coating, the absorbing layer and an antireflection layer are sequentially formed on a stainless steel substrate, wherein the absorbing layer is composed of a surface textured metal Mo film, the thickness is 40 nm-100 nm, and the roughness value is 0.5 nm-3 nm; the antireflection layer is composed of a ceramic Al2O3 or SiO2 film, and the thickness is 50 nm-150 nm. The solar energy selective absorbing coating has a visible-infrared spectrum high absorbing rate, a low infrared spectrum emission rate and good high-temperature thermal stability; the coating is simple in structure, stable in preparation technology, convenient to operate, low in production cost and short in production period; meanwhile, with the surface textured metal Mo coating being the absorbing layer, using and doping of an infrared reflection layer are effectively avoided, and the application range of low-heat emission metal on the solar energy absorbing coating is widened.

Description

technical field [0001] The invention relates to a high temperature resistant solar selective absorbing coating, in particular to a high temperature resistant solar selective absorbing coating with surface textured metal Mo as the absorbing layer and a preparation method thereof, belonging to the technology of solar thermal utilization and thermal power generation field. Background technique [0002] Surface structuring is an effective technique to increase the absorption rate of solar radiation. In 1957, Tabor proposed to make the receiving surface into a continuous V-shaped zigzag. When the solar radiation is incident on this zigzag surface, the sunlight is reflected and absorbed many times, and finally the effective sunlight absorption rate of the surface can be increased to close to 1. Control the morphology and structure of the surface of the film, so that the solar spectrum in the ultraviolet-visible-near-infrared band on the surface of the film is continuously refract...

Claims

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Application Information

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IPC IPC(8): F24J2/48
CPCF24S70/20F24S70/225Y02E10/40
Inventor 刘刚高祥虎郭志明耿庆芬马鹏军
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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