| 摘要 |
The invention relates to a composite material for use as a selective solar absorber having a carrier layer (1), wherein at least the following layers are present on a side (B) of the carrier layer: a reflection layer (3), an absorber layer (5), and a dielectric and/or oxidic antireflection layer (7), wherein a layer (4) made of a nitride, a carbide, or a carbonitride of a metal or a mixture of at least two metals from the subgroups IV, V, or VI is present between the absorber layer (5) and the reflection layer (3), and an optically active layer (6) made of a metal compound having stoichiometric composition is present between the absorber layer (5) and the dielectric antireflection layer (7). The invention further relates to a composite material for use as a selective solar absorber, having a carrier layer (1) made of aluminum or an aluminum alloy, wherein an optically active layer (8) is present on one side (A) of the carrier layer, reducing the reflection of the uncoated carrier material by at least 5% for a specific wavelength ? in the wavelength range of 200 nm to 10µm, preferably between 200 and 2500 nm, for irradiation at a specific index angle, and reducing the reflection of the uncoated carrier material by no greater than 20%, preferably no greater than 5%, in the wavelength range of 2.5 µm to 50 µm. |
