Performance evaluation and durability studies of W/WAlSiN/SiON/SiO2 based spectrally selective solar absorber coating for high-temperature applications: A comprehensive study on thermal and solar accelerated ageing

New spectrally selective coatings for CSP linear receivers operating in air at high temperature

“…Other works Our progress [12] In air at T ≤ 350°C In air at higher T = 600°C [14] In air at T = 400°C at T = 600°C only in vacuum At higher T = 600°C in air [15] Up to 200 h at T = 700°C in vacuum resistance to thermal stress at T = 550°C in air Up to 2240 h at higher T = 600°C in air [16] Up to 168 h at T = 600°C in air At T = 600°C in air verified for significantly longer time of 2240 h [17] Despite thermal stability was assessed up to 2900 h at T = 600°C in air, photothermal performances are limited in showing thermal emissivity at 600°C higher than 40% better photothermal performance because of a significantly lower thermal emissivity of 18% at 600°C. were fixed at 500 mm/min and 60 rpm, respectively.…”

“…Some spectrally selective absorber coatings for receiver tubes in open air were reported in last years with excellent photothermal properties and thermal stability in open air atmosphere for T ≈ 300-350°C [12,13]. Other works studied the thermal stability of spectrally selective coatings at higher temperatures both in vacuum and in air conditions [14][15][16][17].…”

Synthesis and Characterization of Multilayered CrAlN/Al2O3 Tandem Coating Using HiPIMS for Solar Selective Applications at High Temperature

“…These coatings can be combined into multilayer structures to optimize their solar performance exhibiting high absorptance (up to 98%) and reduced emittance (<15%). Some high-temperature solar absorber coatings that have already been reported are CrAlN/CrAlON/Al 2 O 3 , CrAlN/CrAlON/Si 3 N 4 , Ti/AlTiN/AlTiON/AlTiO, TiN/AlCrSiO/AlCrSiO, AlMoN­(H)/AlMoN­(L), Mo–Si 3 N 4 , Mo/ZrSiN/ZrSiON/SiO 2 , W/Ag/WN-AlN/AlN/SiO 2 , W/AlSi x N/AlSiO y N x /AlSiO x , W/CrAlSiN x /CrAlSiN x O y /SiAlO x , and W/WAlSiN/SiON/SiO 2 . In addition, a table presenting the solar selectivity of metal nitride/oxynitrides SSC coatings deposited by magnetron sputtering on various substrates can be found in ref .…”

“…Some high-temperature solar absorber coatings that have already been reported are CrAlN/CrAlON/Al 2 O 3 , CrAlN/CrAlON/Si 3 N 4 , 18 Ti/AlTiN/AlTiON/AlTiO, 19 TiN/AlCrSiO/AlCrSiO, 20 AlMoN(H)/AlMoN(L), 21 Mo–Si 3 N 4 , 22 Mo/ZrSiN/ZrSiON/SiO 2 , 23 W/Ag/WN-AlN/AlN/SiO 2 , 24 W/AlSi x N/AlSiO y N x /AlSiO x , 25 W/CrAlSiN x /CrAlSiN x O y /SiAlO x , 26 and W/WAlSiN/SiON/SiO 2 . 27 In addition, a table presenting the solar selectivity of metal nitride/oxynitrides SSC coatings deposited by magnetron sputtering on various substrates can be found in ref ( 28 ). In previous works, Escobar-Galindo et al studied the microstructure, element composition, chemical bonding, and optical properties of Al y Ti 1– y (O x N 1– x ) multilayered coatings, both before and after single-stage (12 h) and thermal cycles in air.…”

WAlSiN-based solar-selective coating stability-study under heating and cooling cycles in vacuum up to 800 °C using in situ Rutherford backscattering spectrometry and spectroscopic ellipsometry

“…The WAlSiNbased spectrally-selective solar absorber coating is designed to achieve high solar absorptance and low thermal emissivity at elevated temperatures. Its previously proposed layer stacking was W/WAlSiN/SiON/ SiO 2 and durability tests under various conditions indicated stability in air up to 500 • C and in vacuum up to 700 • C for 200 h [23,24]. We have carried out in situ RBS and SE measurements during heatingcooling cycles between quasi room temperature (25 • C ≤ T ≤ 100 • C) and the three subsequently increased high temperatures of 450 • C, 650 • C and 800 • C. The measurements were performed at the cluster tool facility located at the Ion Beam Center (IBC) of the HZDR [21,22,25].…”