Radiation-selective absorber coating, absorber tube and method for its manufacture

摘要

The radiation-selective absorber coating (20) has an antireflection layer (23) arranged above an absorption layer (22) that is arranged above a reflective layer (21). The reflective layer reflecting in an infrared range is arranged on lower and upper barrier layers (24a,24b). The reflective layer is comprised of gold, silver, platinum or copper. The lower barrier layer is comprised of iron or chromium oxide. The upper barrier layer is comprised of silicon oxide. Independent claims are included for the following: (1) process of making absorber tube; and (2) process of operating parabolic collector.