Dark alumina for novel solar receivers
Copyright policy )Dark alumina for novel solar receivers
Concentrating solar power is one of the most promising solar energy exploitation technologies. Its efficiency improvement needs a significant increase of operating temperatures, from the current 500 degrees C to 900 degrees C. Alumina (Al2O3) ceramics are refractory materials characterized by a huge industrial interest, mature production techniques and low cost. In the present work, we successfully synthesized dark ceramic Al2O3 bulks, to evaluate their potential as high-temperature solar absorbers for CSP. We investigated process-dependent ceramics composition, microstructure and optical properties, obtaining pellets with a solar absorbance even higher than that of SiC. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Optical properties, Alumina, Solar absorber, Solar absorbance, Concentrating solar power
Optical properties, Alumina, Solar absorber, Solar absorbance, Concentrating solar power
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