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Photothermal conversion coating and preparation method thereof

A technology of light-to-heat conversion and coating, which is applied in the direction of coating, metal material coating process, superimposed layer plating, etc., can solve the problems that cannot meet the application requirements, and achieve low production cost, excellent optical performance, and weather resistance strong effect

Active Publication Date: 2019-05-21
兰州大成真空科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The film is suitable for the field of medium and low temperature solar collector cores, and can be used for a long time in the medium and low temperature atmospheric environment below 278°C, and cannot meet the application requirements above 278°C

Method used

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  • Photothermal conversion coating and preparation method thereof
  • Photothermal conversion coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0033] See figure 1 , the light-to-heat conversion coating in this embodiment includes a diffusion barrier layer 2 , a composite absorption layer 3 and an anti-reflection layer 4 arranged sequentially on a substrate 1 from bottom to top.

[0034]The substrate 1 is a substrate with infrared reflection function, and the material of the substrate 1 is aluminum, stainless steel, copper or glass; specifically, it can be one of aluminum strips or stainless steel (304, 316L) strips or copper strips or glass sheets , the substrate 1 in this embodiment is an aluminum strip.

[0035] The diffusion barrier layer 2 is a metal carbide layer with a thickness of 50-100 nm. The metal elements in metal carbides are transition metal elements of Group IVB~VIIB, and these metals have the characteristics of high melting point, high boiling point, high hardness and high density. The carbides of these transition metals have high melting points, stable chemical properties, low high-temperature diff...

Embodiment 2 to Embodiment 8）

[0057] The composition of the coating of embodiment 2 to embodiment 8, each layer thickness and performance data see the following table:

[0058]

[0059] The preparation method of Examples 2 to 8 is the same as the coating of Example 1, and the corresponding metal target is replaced on the metal target during preparation. The detection method of solar absorptivity and emissivity is the same as in Example 1.

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Abstract

The invention discloses a photo-thermal conversion coating and a preparation method thereof. The coating comprises a diffusion barrier layer, a composition absorption layer and an anti-reflection layer which are sequentially arranged on a substrate from bottom to top, wherein the substrate is the one that has an infrared reflection function; the diffusion barrier layer is a metal carbide layer; the composite absorption layer is a metal-doped hydrogenated diamond composite layer a-C: H / Me; and the anti-reflection layer is a hydrogenated diamond layer. The solar absorptance of the photo-thermal conversion coating disclosed by the invention is greater than 0.93, the emission rate is between 0.06 and 0.08, and the photo-thermal conversion coating has excellent optical performance. In addition, the weatherability of the coating is strong, the coating is applied to flat panel heat collectors, and the coating can be used under a high-temperature vacuum environment.

Description

technical field [0001] The invention relates to the field of solar heat collectors, in particular to a high-temperature-resistant light-to-heat conversion coating for solar heat collectors and a preparation method thereof. Background technique [0002] Photothermal conversion coatings are used to absorb incident solar radiation and convert it into heat energy. With the continuous development of solar heat utilization requirements and technology, the application range of solar collectors has been developed from low temperature applications (<100°C) to medium temperature applications (100-400°C) and high temperature applications (>400°C) to meet seawater desalination , Solar power generation and other medium and high temperature application fields. However, for solar collectors, the higher the operating temperature, the higher the thermal stability requirements for the light-to-heat conversion coating or selective absorption coating. As the temperature rises, the coati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24S70/25C23C14/00C23C14/06C23C16/27C23C28/04
CPCC23C14/0036C23C14/0635C23C16/278C23C28/046F24S70/25Y02E10/40
Inventor 夏荣斌孔令刚王成兵令晓明黄海洋胡建鹏范多旺
Owner 兰州大成真空科技有限公司
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