High-temperature solar selective absorption coating
A technology of absorption coating and absorption layer, which is applied in the field of solar selective absorption coating in high-temperature heat collecting tubes, can solve the problems of decreasing thermal efficiency, increasing infrared emissivity, increasing heat loss of heat collectors, etc., and achieves good high temperature stability performance , High absorption rate, the effect of reducing working cost
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[0025] Example 1
[0026] The high-temperature solar energy selective absorption coating of the present invention includes four layers of films, and from the substrate to the surface, the infrared reflection layer, the first absorption layer, the second absorption layer and the anti-reflection layer are sequentially formed, and the infrared reflection layer is composed of a Mo film and has a thickness of 20-35nm; the first absorption layer is Mo+TiN film, the thickness is 50-100nm, and the content of TiN is 20-35wt%; the second absorption layer is Mo+TiN film, the thickness is 75-150nm, The content of TiN is 35-50wt%; the anti-reflection layer is a TiN film with a thickness of 50-75nm. The properties of the solar selective absorption coating prepared by the invention are as follows: after the coating is vacuum annealed at 400 DEG C for 1 hour, the coating absorption rate is 92%-93%.
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