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Manganese pigmented anodized copper as solar selective absorber

Abstract : The study concerns the optical and structural properties of layers obtained by a new efficient surface treatment totally free of chromium species. The process is made up of an anodic oxidation of copper in an alkaline solution followed by an alkaline potassium permanganate dipping post-treatment. Coatings, obtained at the lab and pilot scales, are stable up to 220 °C in air and vacuum, present low emissivity (0.14 at 70 °C) and high solar absorptivity (0.96), i.e. a suitable thermal efficiency (0.84 at 70 °C).
Mots-clés : Matériaux
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Laurent Arurault, Mohamed-Ben-Mohamed Belghith, René Bes. Manganese pigmented anodized copper as solar selective absorber. Journal of Materials Science, Springer Verlag, 2007, vol. 42, pp. 1190-1195. ⟨10.1007/s10853-006-1436-2⟩. ⟨hal-00808247⟩



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