A multi-layer hybrid selective solar coating for high temperature thermal solar applications and a process for preparing it

摘要

A multi-layer hybrid selective solar coating comprising a tandem stack of layers containing an intermediate layer of chromium / titanium, a first absorbent layer of aluminum-titanium nitride (AlTiN), a second absorbent layer of aluminum-titanium oxynitride (AlTiON ), an aluminum-titanium oxide (AlTiO) anti-reflective layer and an organically modified silica (ormosil) barrier layer, in which said coating exhibits thermal resistance up to 500 ° C in air and up to 600 ° C in vacuum with a ratio of solar selectivity from 5 to 9.