| 摘要 |
<p>The invention comprises spectrally selective surfaces having a good performance at relatively low cost, and designed to be used mainly, but not exclusively, in solar thermal energy collectors. Suitable substances in powder form are attached by simple and effective means to a suitable surface. This is accomplished by the use of new classes of binders, or alternatively, by novel, purely mechanical means, without the use of a binder. The binders described herein feature a high transparency for the infrared radiation emitted by the hot underlying surface, coupled with good adhesive properties towards both the powder and the surface to be coated. The method of effecting the adhesion of a powder layer to the underlying surface without the use of a binder consists of bringing the powder layer into intimate contact with the surface, for example by pressing or rolling the powder layer onto or into the surface, especially with simultaneous mechanical deformation of the object whose surface is being coated.</p> |
