High-performance multilayer composite solar selective absorption coating and preparation method thereof

A multi-layer composite, absorbing coating technology, applied in coatings, solar thermal devices, solar thermal power generation, etc., can solve the problems of low heat absorption efficiency and poor weather resistance, and achieve improved bonding force, improved heat absorption performance, and improved The effect of corrosion resistance and high temperature resistance

Active Publication Date: 2009-12-09
兰州大成科技股份有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve the technical problems of poor weather resistance and low heat absorption efficiency of the absorbing coating of flat solar collectors in my country, a multi-layer composite solar option suitable for flat solar collectors with high temperature resistance, humidity resistance and high absorption efficiency is proposed. absorbent coating

Method used

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  • High-performance multilayer composite solar selective absorption coating and preparation method thereof

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Effect test

Embodiment 1

[0028] Embodiment 1: a kind of high-performance multi-layer composite solar selective absorbing coating comprises that far-infrared reflection layer 2, composite heat absorption layer 4 and anti-oxidation and anti-reflection layer 5 are arranged on substrate 1 in sequence, far-infrared reflection Layer 2 is an Al layer deposited on the substrate 1 by sputtering; the composite heat absorbing layer 4 is a TiNOx layer deposited on the far-infrared reflective layer 2 by sputtering, and the anti-oxidation and anti-reflection layer 5 is deposited on the composite heat absorbing layer by sputtering SiO on 4 2 layer. The substrate 1 is phosphorus deoxidized copper strip or oxygen-free copper strip or aluminum strip. The thickness of the far-infrared reflective layer 2 is 100-120 nm. The thickness of the composite thermal coefficient layer 4 is 100-120 nm. The thickness of the anti-oxidation and anti-reflection layer 5 is 60-70 nm.

Embodiment 2

[0029] Embodiment 2: A kind of high-performance multi-layer composite solar selective absorbing coating comprises that far-infrared reflection layer 2, composite heat absorption layer 4 and anti-oxidation and anti-reflection layer 5 are arranged on substrate 1 in sequence, far-infrared reflection Layer 2 is an Al layer deposited on the substrate 1 by sputtering; the composite heat absorbing layer 4 is a TiNOx layer deposited on the far-infrared reflective layer 2 by sputtering, and the anti-oxidation and anti-reflection layer 5 is deposited on the composite heat absorbing layer by sputtering SiO on 4 2layer. The substrate 1 is phosphorus deoxidized copper strip or oxygen-free copper strip or aluminum strip. The thickness of the far-infrared reflective layer 2 is 120-170 nm. The thickness of the composite thermal coefficient layer 4 is 120-170 nm. The thickness of the anti-oxidation and anti-reflection layer 5 is 70-90 nm.

Embodiment 3

[0030] Embodiment 3: a kind of high-performance multi-layer composite solar selective absorbing coating, comprises and is provided with far-infrared reflecting layer 2, composite heat-absorbing layer 4 and anti-oxidation and anti-reflection layer 5 in sequence on substrate 1, far-infrared reflecting Layer 2 is an Al layer deposited on the substrate 1 by sputtering; the composite heat absorbing layer 4 is a TiNOx layer deposited on the far-infrared reflective layer 2 by sputtering, and the anti-oxidation and anti-reflection layer 5 is deposited on the composite heat absorbing layer by sputtering SiO on 4 2 layer. The substrate 1 is phosphorus deoxidized copper strip or oxygen-free copper strip or aluminum strip. The thickness of the far-infrared reflective layer 2 is 170-200 nm. The thickness of the composite thermal coefficient layer 4 is 170-200 nm. The thickness of the anti-oxidation and anti-reflection layer 5 is 90-100 nm.

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Abstract

The invention relates to the technical field of solar collectors, in particular to a solar selective absorption coating and a preparation method thereof. The high-performance multilayer composite solar selective absorption coating comprises a far infrared reflecting layer (2), a composite heat absorption layer (4) and an anti-oxidation and anti-reflection layer (5) which are arranged on a matrix (1) in turn. The coating is mainly characterized in that the far infrared reflecting layer (2) is an Al layer which is sputter-deposited on the matrix (1); the composite heat absorption layer (4) is a TiNOX layer which is sputter-deposited on the far infrared reflecting layer (2); and the anti-oxidation and anti-reflection layer (5) is an SiO2 layer which is sputter-deposited on the composite heat absorption layer (4). The coating has the advantages that the solar absorption rate is as high as 90 to 95 percent, and the infrared emitting rate is 6 percent. A Ti+TiC stability layer is arranged between the reflecting layer and the absorption layer, and the stability layer can remarkably improve the binding force of the coating; and simultaneously, the TiC has high temperature resistance and oxidation resistance, thereby the corrosion resistance and high temperature resistance of the coating can be remarkably improved.

Description

technical field [0001] The invention relates to the technical field of solar heat collectors, in particular to a solar selective absorption coating and a preparation method thereof. Background technique [0002] At present, the collectors used for low-temperature thermal utilization of solar energy mainly include flat plate collectors, vacuum tube collectors and plastic collectors without cover plates. The flat plate collector was invented in the late 17th century, but it was not really studied in depth and applied on a large scale until after 1960. Flat-plate solar collector is one of the most basic types of solar collectors. It has the characteristics of simple structure, reliable operation, reasonable cost, strong pressure bearing capacity, and large heat absorption area. It is the best combination of solar energy and buildings. Select one of the collector types. [0003] According to the IEA report, by the end of 2004, flat plate collectors accounted for 35% of the tot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24J2/48B32B15/04B32B15/20B32B7/10C23C14/35C23C14/14C23C14/10C23C14/08
CPCY02E10/40F24S70/30
Inventor 范多旺范多进王成兵王成龙苗树翻
Owner 兰州大成科技股份有限公司
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