Non-vacuum solar spectrum selective absorption coating and preparation method thereof

A technology of absorbing coating and solar spectrum, applied in the field of solar thermal utilization materials, can solve the problems of intolerant of oxidation and low operating temperature, and achieve the effects of low cost, high resistivity and excellent dielectric strength

Active Publication Date: 2011-07-13
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The object of the present invention is to provide a solar spectrum selective absorption coating with a high service temperature and a preparation method thereof, so as to overcome the defects of low service temperature and

Method used

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  • Non-vacuum solar spectrum selective absorption coating and preparation method thereof
  • Non-vacuum solar spectrum selective absorption coating and preparation method thereof
  • Non-vacuum solar spectrum selective absorption coating and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0047] (1) select stainless steel as the substrate 1;

[0048] (2) Select titanium aluminum as the film layer material (transition layer) 2;

[0049] (3) Titanium nitride is selected as the film material (high infrared reflective layer) 3;

[0050] (4) Select a (titanium nitride-aluminum nitride) film with a high titanium nitride content as the film material (the first absorption layer) 4;

[0051] (5) Select a (titanium nitride-aluminum nitride) thin film with low titanium nitride content as the film material (the second absorption layer) 5;

[0052] (6) Select aluminum nitride as the film material (anti-reflection layer) 6;

[0053] (7) A multi-target composite coating machine is used for coating; in order to improve the bonding force between the film and the substrate, the substrate material is ultrasonicated in sulfuric acid, detergent, deionized water, gasoline, and ethanol for 5 to 30 minutes before being placed in a vacuum chamber. Drying; after placing in a vacuum c...

Embodiment 2

[0064] (1) select stainless steel as the substrate 1;

[0065] (2) Select titanium-aluminum thin film as transition layer 2;

[0066] (3) Select titanium aluminum nitride film as the high infrared reflective layer 3;

[0067] (4) Select a (titanium aluminum nitride-aluminum nitride) thin film with a high content of titanium aluminum nitride as the film material, that is, the first absorption layer 4;

[0068] (5) Select a (titanium aluminum nitride-aluminum nitride) thin film with a low content of titanium aluminum nitride as the film material, that is, the second absorption layer 5;

[0069] (6) An aluminum nitride film is selected as the anti-reflection layer 6 .

[0070] (7) A multi-target composite coating machine is used for coating; in order to improve the bonding force between the film and the substrate, the substrate material is ultrasonicated in sulfuric acid, detergent, deionized water, gasoline, and ethanol for 5 to 30 minutes before being placed in a vacuum chamb...

Embodiment 3

[0074] (1) select stainless steel as the substrate 1;

[0075] (2) Select titanium-aluminum thin film as transition layer 2;

[0076] (3) select titanium nitride film as the high infrared reflective layer 3;

[0077] (4) Select a (titanium nitride-aluminum oxide) thin film with a high titanium nitride content as the film material, that is, the first absorption layer 4;

[0078] (5) Select a (titanium nitride-aluminum oxide) thin film with low titanium nitride content as the film material, that is, the second absorption layer 5;

[0079] (6) An aluminum oxide thin film is selected as the anti-reflection layer 6 .

[0080] (7) A multi-target composite coating machine is used for coating; in order to improve the bonding force between the film and the substrate, the substrate material is ultrasonicated in sulfuric acid, detergent, deionized water, gasoline, and ethanol for 5 to 30 minutes before being placed in a vacuum chamber. Drying; after placing in a vacuum chamber, bake a...

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Abstract

The invention relates to a non-vacuum solar spectrum selective absorption coating and a preparation method thereof. The preparation method comprises the following steps: (1) selecting copper or stainless steel with low infrared emissivity as a base material; (2) selecting oxide resistant to high-temperature oxidation, nitride and complex or doped oxide as a film material, wherein a metal or an alloy serves as a bonding force increased layer, metal nitride or pure metal serves as a high infrared reflecting layer, an absorption layer is composed of two conducting particle ceramic layers with different metal nitride conducting particle volume fractions, and aluminium nitride and aluminium oxide serve as an antireflection layer; (3) controlling the components and contents of different film materials by controlling gas flow and sputtering power; (4) cleaning the base material before the base material is placed into a vacuum chamber, and carrying out argon ion bombarding on the surface of the base material before sputtering is carried out; and (5) obtaining a multilayer coating, wherein the thickness of the coating is less than 500nm, and the coating has high absorption rate alpha (0.9-0.97) in the solar spectrum range (0.3-2.5microns) and has extremely low emissivity epsilon (0.02-0.18) in the infrared region (2.5-50microns).

Description

technical field [0001] The invention belongs to the technical field of solar thermal utilization materials, in particular to a medium-high temperature solar spectrum selective absorption coating prepared by magnetron reactive sputtering technology. The coating has better spectral selective absorption characteristics, and the coating has a service temperature higher than 400 degrees centigrade in a non-vacuum environment and a service temperature higher than 500 degrees centigrade in a vacuum. The coating can be used in non-vacuum flat plate heat collectors and high-temperature heat collectors for trough solar thermal power generation. Background technique [0002] Solar selective absorbing coatings are characterized by high absorptivity α in the solar spectral range (0.3-2.5 microns) and low emissivity ε in the infrared region (2.5-50 microns). It can convert low-energy-density solar energy into high-energy-density thermal energy, enrich solar energy, and improve solar-ther...

Claims

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Application Information

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IPC IPC(8): F24J2/48C23C14/34C23C14/06B32B9/04
CPCY02E10/40
Inventor 郝雷蒋利军王树茂刘晓鹏李志念吕芳
Owner GRIMAT ENG INST CO LTD
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