W/AlSiTiNx/SiAlTiOyNx/SiAlOx multilayered solar thermal selective absorber coating. (1st September 2020)

• Record Type: Journal Article
• Authors: AL-Rjoub, A.; Rebouta, L.; Cunha, N.F.; Fernandes, F.; Barradas, N.P.; Alves, E.
• Is Part Of: Solar energy. Volume 207(2020)
• Page Start: 192
• Page End: 198
• Publication Date: 2020-09-01
• Subjects: Selective coating -- Sputtering -- Thermal stability -- AlSiTiNx/SiAlTiOyNx; Solar energy -- Periodicals; Solar engines -- Periodicals; 621.47
• DOI: 10.1016/j.solener.2020.06.094
• Languages: English
• ISSNs: 0038-092X

Abstract

Highlights: Solar selective absorber design for high temperature applications. High stability and good oxidation resistance of solar thermal optical stack. Improved selective solar thermal absorber based on AlSiTiNx and SiAlTiOy Nx . Abstract: Solar thermal energy has often been used as a renewable green energy source. Here we present a design composed of a highly selective solar thermal absorber coating that has been deposited by DC magnetron sputtering. This will consist of four layers: W/AlSiTiNx /SiAlTiOy Nx /SiAlOx . The coating that was utilised revealed an excellent average solar thermal absorbance, (α = 95.5%) with very low emittance, (ε = 9.6% calculated for 500 °C) together with an excellent thermal stability after annealed at 500 °C, in air for 350 h, and at 630 °C in vacuum for 220 h.