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US 6,783,653 B2Granted
Solar selective absorption coatings
AssigneeSandia Corporation
InventorsAlan R. Mahoney, Scott T. Reed, Carol S. Ashley, F. Edward Martinez
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Abstract
A new class of solar selective absorption coatings are disclosed. These coatings comprise a structured metallic overlayer such that the overlayer has a sub-micron structure designed to efficiently absorb solar radiation, while retaining low thermal emissivity for infrared thermal radiation. A sol-gel layer protects the structured metallic overlayer from mechanical, thermal, and environmental degradation. Processes for producing such solar selective absorption coatings are also disclosed.
Claims12
A process to apply a solar selective absorption coating to a substrate, comprising:
- a) providing said substrate with a low emissivity surface;
- b) depositing a nanostructured selective absorption layer from a deposition solution atop said low emissivity surface, wherein depositing the nanostructured selective absorption layer comprises electrodepositing a structured metallic layer on said low emissivity surface;
- c) applying a sol-gel precursor overcoating to said absorption layer;
- and
- d) curing the sol-gel precursor overcoating.
2 more elements
Dependencies are inferred from the claim text.