High durability solar absorptive coating and methods for making same
| DWPI Title: Forming solar absorptive coating on surface, comprises applying ceramic material comprising chromium oxide or lanthanum-based perovskite to surface, and treating coated surface with pulsed laser source i.e. nanosecond- or femtosecond laser |
| Abstract: The present invention relates to solar absorptive coatings including a ceramic material. In particular, the coatings of the invention are laser-treated to further enhance the solar absorptivity of the material. Methods of making and using such materials are also described. |
| Use: The method is useful for forming a solar absorptive coating on a surface. |
| Advantage: The method: provides the solar absorptive coating which exhibits a solar absorptance of greater than 0.94 and/or is a high-temperature solar selective coating (claimed), hence highly durable; provides coating surfaces having laser-treatment created unique nanostructures that are significantly smaller than the wavelength of light in the solar spectrum and could easily scatter photons resulting in improved solar absorption; utilizes the ceramic coating that is significantly more durable at high temperature than organic based Pyromark2500 (RTM: Silicone-based high-temperature paint), thus exhibiting high potential for concentrating solar power systems; and utilizes the pulsed laser source exhibiting optimized laser wavelength, laser pulse frequency, laser pulse width, pulse repetition rate, power, power density, fluence, scan rate, scan pattern or beam spot size. |
| Novelty: Forming a solar absorptive coating on a surface, comprises: (a) applying a ceramic material to the surface to form a coated surface, where the ceramic material comprises chromium oxide or a lanthanum-based perovskite; and (b) treating the coated surface with a pulsed laser source, where the pulsed laser source is a nanosecond laser or femtosecond laser, thus forming the solar absorptive coating on the surface. |
| Filed: 2/26/2015 |
| Application Number: US14632838A |
| Tech ID: SD 12714.1 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
| Data from Derwent World Patents Index, provided by Clarivate All rights reserved. Republication or redistribution of Clarivate content, including by framing or similar means, is prohibited without the prior written consent of Clarivate. Clarivate and its logo, as well as all other trademarks used herein are trademarks of their respective owners and used under license. |