SPECTRALLY SELECTIVE SURFACE COATING OF THE RECEIVER TUBE OF A SOLAR CONCENTRATOR, AND METHOD FOR THE MANUFACTURE THEREOF

摘要

A surface coating material for tubes of solar collector installations, particularly of the linear parabolic mirror type, consisting of a multilayer structure including a lower layer of preferably infrared reflecting metal and an upper layer of reflection preventing material, between which preferably one or two layers of a novel composite ceramic-metal material of the CERMET type is sandwiched. In particular, the ceramic matrix of CERMET consists of amorphous aluminium nitride (AlN), and the metal particles dispersed into the ceramic matrix consist of titanium nitride (TiNx) or zirconium nitride (ZrNx) or hafnium nitride (HfNx).