Tungsten oxide and zirconium oxide high-temperature solar selective absorption coating and production method thereof

Abstract

The invention discloses a tungsten oxide and zirconium oxide high-temperature solar selective absorption coating and a production method thereof. The tungsten oxide and zirconium oxide high-temperature solar selective absorption coating comprises three layers of films; a first layer of infrared reflective layer is a cuprum or argentum film which is located on the surface of a substrate, wherein the thickness of the cuprum or argentum film is 100 to 300 nm; a second layer of absorption layer comprises two sub-layers which are tungsten oxide and zirconium oxide films; the thickness of the first sub-layer and the thickness of the second sub-layer are both 150 to 300 nm; the volume percent of zirconium oxide in the first sub-layer is 50 to 75% and the rest is tungsten oxide; the volume percent of zirconium oxide in the second sub-layer is 30 to 50% and the rest is tungsten oxide; the first sub-layer is adjacent to the first layer of infrared reflective layer; the second sub-layer is adjacent to a third layer of antireflection layer; the third layer of antireflection layer is a zirconium oxide film, wherein the thickness of the zirconium oxide film is 120 to 200 nm. According to the tungsten oxide and zirconium oxide high-temperature solar selective absorption coating and the production method thereof, the high-temperature stability is excellent and the good thermal stability can be maintained under the 500 to 600 DEG C high-temperature vacuum conditions or under the 400 DEG C atmospheric conditions.

Description

technical field [0001] The invention belongs to the technical field of solar energy utilization, in particular to a WO x / ZrO x High temperature solar selective absorbing coating and preparation method thereof. Background technique [0002] The solar spectrum selective absorption coating has high absorptivity in the visible-near-infrared band and low emissivity in the infrared band, which is the key to improving the efficiency of light-to-heat conversion for solar collectors. With the continuous development of solar heat utilization requirements and technology, the application range of solar collector tubes has been developed from low temperature applications (≤100°C) to medium temperature applications (100°C-350°C) and high temperature applications (350°C-500°C). Meet the requirements of medium and high temperature applications such as seawater desalination and solar power generation. The selective absorption coating needs to have good high temperature thermal stability ...

AI Technical Summary

Problems solved by technology

Commonly used materials are mainly Cr-Cr oxide, Ni-Al 2 o 3 、Mo-Al 2 o 3 , Ti / Al / Si nitrides or (and) oxides, etc. However, these materials are only used in a vacuum environment of 300 ° C to 400 ° C, for higher temperatures 500 ° C ~ 600 ° C vacuum and 450 ° C ~ 500 ° C non-vacuum Coatings for environmental use have not been reported in China

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