Radiation-selective absorber coating and absorber tube with radiation-selective absorber coating

摘要

The coating (20) has an absorption layer (22) arranged over a layer (21) reflecting in infrared range. An anti-reflection layer (23) is arranged on the absorption layer, and the layer reflecting in infrared range is arranged on two barrier layers (24a, 24b) that are arranged over each other. One of the barrier layers is made of thermally generated oxide such as chromite oxide. The other barrier layer is made of a cermet material that is comprised of elements such as aluminum oxide, silicon oxide, nickel oxide, chromium oxide, molybdenum, nickel, tungsten and vanadium.