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Medium-low temperature solar spectrum selective absorption coating and preparation method thereof

An absorption coating, solar spectrum technology, applied in coating, metal material coating process, ion implantation plating, etc., can solve the problem of low performance, and achieve the effect of improving absorption rate, increasing production capacity, and reducing reflection

Pending Publication Date: 2019-03-12
BEIJING HANGBO NEW MATERIAL TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Interference-absorbing coatings have a simple single-layer absorption structure, but low performance. In order to obtain higher performance, double-layer or multi-layer absorption is required, but the complexity of the coating structure and preparation process is increased.

Method used

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  • Medium-low temperature solar spectrum selective absorption coating and preparation method thereof
  • Medium-low temperature solar spectrum selective absorption coating and preparation method thereof
  • Medium-low temperature solar spectrum selective absorption coating and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0040] For the preparation of the substrate, a polished metal plate or glass plate is selected, and after mechanical cleaning, radio frequency argon ion cleaning is performed to remove the surface contamination layer and oxide layer, and to improve the surface activity of the substrate.

[0041] For the preparation of the infrared reflection layer, a metal infrared reflection layer is prepared on the surface of the above-mentioned base layer by (pulse) DC magnetron sputtering, and the selected target material can be metal aluminum (purity above 99.7%).

[0042] The preparation of the absorbing layer is to prepare the absorbing layer on the above-mentioned infrared reflective layer by (pulse) direct current magnetron sputtering method, and the selected target material is metal Cr (purity above 99.7%).

[0043] The preparation of the transition layer is to prepare the transition layer on the above-mentioned absorbing layer by (pulse) DC reactive magnetron sputtering, and the sele...

Embodiment

[0046] Table 1 shows the process-controlled thickness of each single-layer film in an embodiment of a double-absorbing layer-transition layer spectrally selective absorbing coating prepared by magnetron sputtering.

[0047] Table 1

[0048]

[0049] Carry out the preparation of embodiment according to above-mentioned preparation method, concrete operation steps are as follows:

[0050] 1) Cleaning of the glass substrate: Firstly, the glass substrate is initially cleaned with a neutral detergent; then, the surface of the glass substrate is bombarded by a radio frequency ion source in the film feeding chamber of the coating equipment for secondary cleaning, and the process parameters are set as follows: radio frequency The sputtering power of the power supply is 200w, the flow rate of the working gas Ar (purity 99.99%) is 45sccm, and the working pressure is 9×10 -2 mTorr, the sputtering time is 300s.

[0051] 2) The glass substrate is transported into the sputtering chamber...

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Abstract

The invention relates to a medium-low temperature solar spectrum selective absorption coating and a preparation method thereof, in particular to a solar spectrum selective absorption coating which haslow emissivity and a high ratio of the solar spectral absorption rate alpha to the infrared radiation rate epsilon (T) and is based on metal and metal nitride absorption, and a preparation method thereof. The medium-low temperature solar spectrum selective absorption coating sequentially comprises a base layer, an infrared reflection layer, an absorption layer, a transition layer and an antireflection layer; and the absorption layer comprises a first absorption sublayer and a second absorption sublayer. The medium-low temperature solar spectrum selective absorption coating and the preparationmethod thereof at least have the following characteristics that the coating has low infrared radiation rate, the overall absorption rate of the coating is increased, materials of the coating has theabsorption effect in the solar spectral energy range, and reflection of sunlight on the surface of the absorption layer is effectively reduced; reflection of light at an interface in the coating is effectively reduced; and the overall preparation efficiency of the coating is effectively improved, and the production capacity is improved.

Description

technical field [0001] The invention relates to a medium-low temperature solar spectrum selective absorption coating and its preparation method, in particular to a coating with low radiation rate and high ratio of solar spectrum absorption rate α to infrared radiation rate ε(T), based on metal and metal Nitride-absorbing solar spectrum selective absorbing coating and method for its preparation. Background technique [0002] The solar spectrum selective absorption coating is the core material of the solar thermal collector. It has high absorption performance in the solar radiation range (0.3μm-2.5μm), absorbs sunlight and converts it into heat energy, and at the same time, has low radiation performance in the infrared thermal radiation band (mainly in the 2μm-50μm), thus To achieve the effect of efficiently suppressing radiation heat dissipation. The important indicators to measure the performance of the solar spectrum selective absorption coating mainly include: the solar ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/08C23C14/10C23C14/16C23C14/18C23C14/35F24S70/225
CPCC23C14/08C23C14/081C23C14/10C23C14/165C23C14/185C23C14/352Y02E10/40
Inventor 孙志强刘静杨中周余刚汪洪
Owner BEIJING HANGBO NEW MATERIAL TECH
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