The Spectral Properties and Thermal Stability of AlCr-AlCrON Solar Selective Absorber Coating

Abstract:

Spectrally selective AlCr-AlCrON cermet solar absorber coating has been deposited on Cu substrate experimentally by reactive DC magnetron sputtering and heat-treated in air at 300°C for 2h. The spectral properties and thermal stability of the as-synthesized AlCr-AlCrON coatings were characterized. The solar absorptance and thermal emittance of the as-synthesized AlCr-AlCrON coating are 0.926 and 0.065, respectively. In addition, after heat treatment at 300 ° C for 500 h in air, the spectral properties of the as-synthesized AlCr-AlCrON coating is virtually unchanged. The results indicate that the as-synthesized AlCr-AlCrON coating has good spectral properties and thermal stability, which will be a good selective absorbing coating for mid-temperature solar vacuum collector tubes.

• Periodical: Applied Mechanics and Materials (Volumes 423-426)
• Pages: 419-425
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.423-426.419
• Online since: September 2013
• Authors: Ya Nan Li*, Xiang Rong Liu, Yin Fang Cui, Jia Qi Liu, Guang Ming Xie, Cong Wang
• Keywords: AlCr-AlCrON Coating, Mid-High Temperature Solar Selective Coating, Reactive DC Magnetron Sputtering, Thermal Stability

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