Dark alumina for novel solar receivers

Year: 2020

Authors: Sani E., Failla S., Sciti D.

Autors Affiliation: CNR-INO National Institute of Optics, Largo E. Fermi, 6, Firenze I-50125 Italy; CNR-ISTEC, Institute of Science and Technology for Ceramics, Via Granarolo 64, Faenza I-48018 Italy

Abstract: 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°C to 900°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.


Volume: 176      Pages from: 58  to: 62

KeyWords: Alumina
Solar absorber
Concentrating solar power
Solar absorbance
Optical properties
DOI: 10.1016/j.scriptamat.2019.09.038

Citations: 12
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