A kind of solar energy selective absorbing coating of multilayer structure and preparation method thereof

A technology of multi-layer structure and absorption coating, applied in the field of solar coating materials, can solve the problems of optical performance degradation, damage to the original structure of multi-layer coatings, easy occurrence of cracks, etc., and achieves reduction of infrared emissivity and porosity. , the effect of enhancing the absorption rate

Inactive Publication Date: 2019-08-27
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem of interlayer bonding of multilayer coatings and defects such as cracks that are prone to occur under conditions of thermal expansion or thermal stress will destroy the original structure of multilayer coatings and reduce their optical properties.

Method used

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  • A kind of solar energy selective absorbing coating of multilayer structure and preparation method thereof
  • A kind of solar energy selective absorbing coating of multilayer structure and preparation method thereof
  • A kind of solar energy selective absorbing coating of multilayer structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A multi-layer solar selective absorbing coating, including WC-Co supersonic thermal spraying solar absorbing layer from the bottom layer to the surface, the first layer of CuCoMnO x Sealing layer, second layer CuCoMnO x -SiO 2 transition layer and third layer of SiO 2 AR layer composition.

[0033] The preparation process of the solar selective absorbing coating of the above-mentioned multilayer structure comprises the following steps:

[0034] (1) Polish the WC-Co solar selective absorbing coating obtained by supersonic thermal spraying with water-abrasive sandpaper, and then use 1000 mesh, 1500 mesh, and 2000 mesh sandpaper to cross-polish the coating, and each time the polishing process faces Use even force in one sanding direction. Use a roughness measuring instrument to test its surface roughness until its roughness is reduced to R A = about 1.3 μm, after polishing, use ethanol solution to ultrasonically clean the coating for 30 minutes.

[0035] (2) Preparat...

Embodiment 2

[0050] A multi-layer solar selective absorbing coating, including WC-Co supersonic thermal spraying solar absorbing layer from the bottom layer to the surface, the first layer of CuCoMnO x Sealing layer, second layer CuCoMnO x -SiO 2 transition layer and third layer of SiO 2 AR layer composition.

[0051] The preparation process of the solar selective absorbing coating of the above-mentioned multilayer structure comprises the following steps:

[0052] (1) Polish the WC-Co solar selective absorbing coating obtained by supersonic thermal spraying with water-abrasive sandpaper, and then use 1000 mesh, 1500 mesh, and 2000 mesh sandpaper to cross-polish the coating, and each time the polishing process faces Use even force in one sanding direction. Use a roughness measuring instrument to test its surface roughness until its roughness is reduced to R A =1.7μm or so, use ethanol solution to ultrasonically clean the coating for 30 minutes after polishing.

[0053] (2) Preparation...

Embodiment 3

[0068] A multi-layer solar selective absorbing coating, from the bottom to the surface, including Ni-Mo supersonic thermal spraying solar absorbing layer, the first layer of CuCoMnO x Sealing layer, second layer CuCoMnO x -SiO 2 transition layer and third layer of SiO 2 AR layer composition.

[0069] The preparation process of the solar selective absorbing coating of the above-mentioned multilayer structure comprises the following steps:

[0070] (1) Polish the Ni-Mo solar selective absorbing coating obtained by supersonic thermal spraying with water-abrasive sandpaper, and then use 1000 mesh, 1500 mesh, and 2000 mesh sandpaper to cross-polish the coating, and each time the polishing process faces Use even force in one sanding direction. Use a roughness measuring instrument to test its surface roughness until its roughness is reduced to R A = about 1.5 μm, after polishing, use ethanol solution to ultrasonically clean the coating for 30 minutes.

[0071] (2) Preparation o...

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Abstract

The invention belongs to the field of a solar coating material, and particularly relates to a solar selective absorption coating with a multilayer structure and a preparation method thereof. The solar selective absorption coating with the multilayer structure consists of a heat spray coating absorption layer at the bottom layer, a CuCoMnOx hole sealing layer at the first layer, a CuCoMnOx-SiO2 transition layer at the second layer and a SiO2 anti-reflection layer at the third layer. Various kinds of sol adopted by the invention respectively have the protection effect on the heat spray coating absorption coating; under the continuous effect of sol and grinding, the coating surface is more and more compact through the peak-load shifting effect; the finally formed multilayer structure is stable and has good transition performance and combining performance; the spectral selectivity of the heat spray coating absorption layer is greatly improved; meanwhile, the weathering resistant performance of the coating is also enhanced to a certain degree.

Description

technical field [0001] The invention belongs to the field of solar coating materials, and in particular relates to a multilayer structure solar selective absorption coating and a preparation method thereof. Background technique [0002] With the increasing human demand for energy, traditional energy can no longer meet the needs of human development due to its non-renewable and environmental pollution, which forces human beings to urgently find new energy sources. As a clean energy with huge reserves and no pollution, solar energy has been a research hotspot in recent decades, among which solar photothermal conversion technology is an important technical means. Foreign countries have conducted more than 60 years of research on material development and process improvement of photothermal conversion technology, while domestic photothermal conversion technology started relatively late, and the national 973 plan and 863 plan have solar photothermal conversion technology in recent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/18C23C18/12C23C28/00
CPCC23C4/18C23C18/1208C23C18/1216C23C18/1225C23C18/1254C23C28/345F24S70/20F24S70/225Y02E10/40
Inventor 程旭东柯成竹郭威阳
Owner WUHAN UNIV OF TECH
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