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Medium-high temperature solar photothermal selective absorbing coating

A technology that absorbs coatings and solar energy, applied in the field of solar thermal utilization, can solve the problems of reducing the performance of the film layer, achieve good thermal stability, and ensure long-term stability

Inactive Publication Date: 2013-04-10
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The medium and high temperature solar light and heat selective absorption coatings that have been researched and developed so far use W, Mo, Au, etc. film performance, for this purpose, we propose to add a diffusion barrier layer between the infrared reflective layer and the substrate

Method used

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  • Medium-high temperature solar photothermal selective absorbing coating

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Embodiment

[0022] combine figure 1 The coating profile layer shown, the coating preparation process is as follows: (1) use the magnetron sputtering system, select 99.7% Ti target material, 99.99% Al 2 o 3 target and 99.99% Cu target. The substrate is made of 316L stainless steel. Before the deposition starts, the vacuum chamber background is evacuated to 4×10 -4 Pa. (2) Fill in the working gas Ar, adjust the flow rate so that the vacuum degree is stable at the sputtering pressure of 0.1Pa. Turn on Al 2 o 3 The RF sputtering power supply of the target, adjust the power to 500W, and the voltage is 2000V, for Al 2 o 3 Reactive sputtering was performed to prepare 20nm thick Al 2 o 3 Diffusion barrier. (3) Adjust the Ar flow rate to the sputtering pressure of 0.1Pa, turn on the DC sputtering power supply of the Cu target, adjust the voltage to 400V, and the current to 0.1A to prepare a 90nm thick Cu infrared high reflection layer. (4) Fill in the working gas Ar, adjust the flow ra...

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Abstract

The invention provides a novel medium-high temperature solar photothermal selective absorbing coating, which consists of five layers sequentially arranged from the substrate surface to the top of a heat absorbing body, wherein the first layer is a diffusion blocking layer, the second layer is an infrared reflecting layer, the third layer is a metal Ti and metal ceramic composite film, the fourth layer is a metal Ti and metal ceramic composite film, and the fifth layer is a single-layer antireflection film. Under the condition of the atmospheric quality factor being AM1.5, the absorptivity of the coating is 95.5 percent, the hemispherical emissivity is 9.8 percent, and the coating has good heat stability and can be used in vacuum environment within 450 DEG C for a long time. The coating has important practical value and wide application prospect in the field of solar heat utilization.

Description

technical field [0001] The invention relates to a novel solar photothermal selective absorption coating, which is one of the key technologies in solar photothermal utilization such as solar trough photothermal power generation, solar air conditioning, and seawater desalination. It belongs to the technical field of solar thermal utilization. Background technique [0002] Solar thermal utilization is one of the important application methods of solar energy scientific utilization. At present, especially the medium and high temperature solar thermal utilization of solar energy has attracted more and more attention. Its utilization methods include solar thermal power generation, solar desalination of seawater, solar heating and drying , solar air conditioners, etc. The trough solar thermal power generation is a typical representative of high temperature solar thermal utilization in solar energy, and has important commercial application prospects. The medium and high temperature...

Claims

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Application Information

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IPC IPC(8): B32B15/04B32B9/04B32B33/00
Inventor 李刚邓淞文孙龙
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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