Thermal absorber coating
When a component is located inside a vacuum environment and without a good conduction connection, the only way for the component to lose thermal energy is through thermal radiation. Dissipation of thermal radiation inside vacuum environments can be difficult, especially if the vacuum chamber is made of metal. The metal sides of the chamber will just reflect the majority of the thermal radiation back towards the source, and this will increase the temperature of the component.
A way to lower the temperature of components in vacuum environments can be to increase the thermal radiation absorption of the metallic chamber. The metal chamber can then be cooled from the outside to lower the thermal radiation of the chamber.
We at Polyteknik AS has developed a thin film coating that increases the absorption to above 70 %, and the coating is vacuum stable up to temperature above 500 ˚C.