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This paper reports a new efficient solar selective surface in high temperature application.The influence of the monolayer’s microstructure and deposition rate was firstly discussed.Then the nitride nano-multilayer on the polished stainless steel (herein after referred as “SS”) substrate was prepared with Ti and Al metal targets by DC.and R.F.magnetron co-sputtering.The samples were annealed in air at different temperatures ranging from 350 to 800°C for 2 h to evaluate their thermal stability.The samples’ surface and cross-section morphology,crystal structure,phase composition,optical properties were analyzed by scanning electron microscopy,X-ray diffraction,UV-VIS-NIR spectrophotometer and infrared emissivity tester.The results show that the coatings exhibit high solar selectivity (α/ε) of 0.943/0.08 even after heat-treatment up to 400°C for 2 h in air.After heat-treatment at 600°C in air,the solar selectivity decreases to 0.92/0.16.
This paper reports a new efficient solar selective surface in high temperature application. The influence of the monolayer’s microstructure and deposition rate was referred to.Then the nitride nano-multilayer on the polished stainless steel (hereafter referred as “SS”) substrate. was prepared with Ti and Al metal targets by DC.and RFmagnetron co-sputtering. The samples were annealed in air at different temperatures ranging from 350 to 800 ° C for 2 h to evaluate their thermal stability. The samples’ surface and cross- section morphology, crystal structure, phase composition, optical properties were analyzed by scanning electron microscopy, X-ray diffraction, UV-VIS-NIR spectrophotometer and infrared emissivity tester. results show that the coatings exhibit high solar selectivity (α / ε) of 0.943 / 0.08 even after heat-treatment up to 400 ° C for 2 h in air. After heat-treatment at 600 ° C in air, the solar selectivity decreases to 0.92 / 0.16.