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Non-vacuum high-temperature solar selective absorption periodic coating and preparation method thereof

A periodic coating, medium and high temperature technology, applied in the field of coating, can solve the problems of coating corrosion resistance, too thin thickness, single function, etc. Effect

Inactive Publication Date: 2015-05-27
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This composite structure design solves the problem of single-layer structure with single function, but due to the wavelength requirements of the solar spectrum, the thickness of each layer is too thin, and defects such as through holes are easily formed, which has a negative impact on the corrosion resistance of the coating.
Moreover, due to the large number of layers, the optical parameters of each layer are quite different, and the procedures used in the design are very complicated, which objectively increases the design and manufacturing costs.

Method used

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  • Non-vacuum high-temperature solar selective absorption periodic coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: Periodic coating for selective absorption of solar energy at high temperature in non-vacuum

[0021] 1) Put the base material 1, that is, 301 stainless steel into the multi-arc ion plating furnace, and install the Ti-Al target, where Al:Ti=3:1;

[0022] 2) Infuse nitrogen gas, control the deposition time and gas flow rate to deposit the metal nitride coating 2 containing the metal component, and obtain an AlN-TiN coating containing the metal component Ti, with a thickness of 120nm;

[0023] 3) Reduce the flow rate of nitrogen gas and feed oxygen at the same time, control the deposition time and gas flow rate to deposit the metal oxynitride coating 3 containing metal components, and obtain an AlON-TiON coating containing metal component Ti with a thickness of 150nm;

[0024] 4) Repeat step 2) and step 3) twice to obtain a periodic coating;

[0025] 5) Deposit a dense oxide film 4 according to the periodic coating, and the coating contains Ti element, then dep...

Embodiment 2

[0030] Example 2: Periodic coating for selective absorption of solar energy at high temperature in non-vacuum

[0031] 1) Put the base material 1, that is, 301 stainless steel into a multi-arc ion plating furnace, and install a Cr-Al target, where Al:Cr=2:1;

[0032] 2) Infuse nitrogen gas, control the deposition time and gas flow rate to deposit the metal nitride coating 2 containing the metal component, and obtain an AlN-CrN coating containing the metal component Cr, with a thickness of 115nm;

[0033] 3) Reduce the flow rate of nitrogen gas and feed oxygen at the same time, control the deposition time and gas flow rate to deposit the metal oxynitride coating 3 containing metal components, and obtain an AlON-CrON coating containing metal component Cr with a thickness of 130nm;

[0034] 4) Repeat step 2) and step 3) twice to obtain a periodic coating;

[0035] 5) Deposit a dense oxide film 4 according to the periodic coating, and the coating contains Cr element, then deposit...

Embodiment 3

[0039]Embodiment 3: High temperature solar energy selective absorption periodic coating in non-vacuum

[0040] 1) Put the base material 1, namely 301 stainless steel, into the magnetron sputtering furnace, and install the Ti-Al target, where Al:Ti=1:2;

[0041] 2) Infuse nitrogen gas, control the deposition time and gas flow rate to deposit the metal nitride coating 2 containing the metal component, and obtain an AlN-TiN coating containing the metal component Ti, with a thickness of 200nm;

[0042] 3) Reduce the flow rate of nitrogen gas and feed oxygen at the same time, control the deposition time and gas flow rate to deposit the metal oxynitride coating 3 containing metal components, and obtain an AlON-TiON coating containing metal component Ti with a thickness of 180nm;

[0043] 4) Repeat step 2) and step 3) twice to obtain a periodic coating;

[0044] 5) Deposit a dense oxide film 4 according to the periodic coating, and the coating contains Ti element, then deposit TiO ...

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Abstract

The invention relates to a non-vacuum high-temperature solar selective absorption periodic coating and a preparation method thereof, and the coating comprises a compact oxide film and a periodic coating from top to bottom, wherein the periodic coating comprises at least two periodic units that have cermet coatings of different refractive indexes, and the cermet coatings are made by multi arc ion plating technology or magnetron sputtering technology; the periodic units are arranged repeatedly to form a periodic coating; the cermet coating comprises a metal nitrogen oxide coating and a metal nitride coating that contain metal from top to bottom. The beneficial effects of the present invention are that 1) the ideal thickness can be determined by calculating a characteristic matrix, therefore the procedure is simplified and the cost is reduced; 2) a through hole can be prevented from negating, and the corrosion resistance of the coating is raised; 3) the outermost layer of the invention is a compact film, therefore The invention can be applied in non-vacuum condition.

Description

technical field [0001] The invention relates to the coating field, in particular to a non-vacuum high-temperature solar selective absorption periodic coating and a preparation method thereof. Background technique [0002] The invention is mainly used for improving the heat absorption efficiency of the tower type solar heat collector of the solar thermal power station. Related research began in the 1950s. At present, only the magnetron sputtering method and the multi-arc ion plating method have been put into use or are being studied for the preparation of medium and high temperature solar selective absorption coatings. The magnetron sputtering method has high thickness control precision. Generally, the thickness of the magnetron sputtering film used as a selective absorption coating is about 200-800nm, and the film layer is dense, and its selective absorption performance is also very good, which has been reported. Composite TiAlN on copper substrate x o y The absorptivity...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B15/04B32B9/04F24J2/48C23C14/06C23C14/08
CPCY02E10/40
Inventor 程旭东宫殿清张朴罗干陈华连亮
Owner WUHAN UNIV OF TECH
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