A selective-black absorber capable of operation at elevated temperatures and high efficiency as a solar energy absorber is described. A cermet of MgO/Au, MgO/Pt, and Cr.sub.2 O.sub.3 /Cr having high solar energy absorptance and low infrared energy emissivity is coated on a substrate having high infrared...http://www.google.fr/patents/US4312915?utm_source=gb-gplus-shareBrevet US4312915 - Cermet film selective black absorber
