[en] Cermet based-coatings, made of a ceramic matrix and metallic nanoparticles, have attracted a lot of attention in applications such as solar absorbers in a solar concentrating system since they allow a strong solar absorptance, a low IR emittance, and present good thermal stability. It has been shown that many parameters impact the performances of the cermet-based solar absorber such as the thickness, composition, and features of the metallic nanoparticles. In this study, we report on the synthesis of a Al2O3-Ag cermet by reactive co-sputtering of Ag and aluminum in Ar/O2 gas mixtures. The influence of important experimental parameters (i.e. sputtering power on the Ag target, deposition time, and O2 content) on the chemistry, morphology, and optical properties of the cermet coating is studied while the photothermal property of the cermet has been evaluated by measuring the surface elevation temperature of the coating under 1 sun irradiation. Our data reveal that by optimizing the features of the cermet, an absorbance of 0.92 and a surface temperature elevation up to 9.1 K can be reached after 30 min of illumination.
Disciplines :
Chemistry Physics
Author, co-author :
Chauvin, Adrien ; Université de Mons - UMONS ; Chemistry of Surfaces, Interfaces and Nanomaterials, Faculty of Sciences, Université libre de Bruxelles, Brussels, Belgium
Savorianakis, Grégory ; Université de Mons - UMONS > Faculté des Sciences > Service de Chimie des Interactions Plasma-Surface
Horak, Lukas; Department of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University, Praha 2, Czech Republic
Dopita, Milan; Department of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University, Praha 2, Czech Republic
Voué, Michel ; Université de Mons - UMONS > Faculté des Sciences > Service de Physique des matériaux et Optique
S878 - Physique des matériaux et Optique S882 - Chimie des Interactions Plasma-Surface
Research institute :
R400 - Institut de Recherche en Science et Ingénierie des Matériaux
Funders :
Fonds De La Recherche Scientifique - FNRS Society for Experimental Mechanics
Funding text :
The authors gratefully acknowledge D. Cornelissen (Mons Univ.), Y. Paint (Materia Nova, Mons), and X. Noirfalise (Materia Nova, Mons) for their technical assistance on the co-sputtering system, SEM, and on the XPS, respectively. A.C. thanks the FNRS for the financial support through the “VirusSurf” project No H.P064.20 . S. Konstantinidis is a senior research associate of the National Fund for Scientific Research (FNRS, Belgium).The authors gratefully acknowledge D. Cornelissen (Mons Univ.), Y. Paint (Materia Nova, Mons), and X. Noirfalise (Materia Nova, Mons) for their technical assistance on the co-sputtering system, SEM, and on the XPS, respectively. A.C. thanks the FNRS for the financial support through the “VirusSurf” project No H.P064.20. S. Konstantinidis is a senior research associate of the National Fund for Scientific Research (FNRS, Belgium).
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