Multilayer insulation for satellites

Thermal insulation is a genuine challenge for engineers at time of conceiving a system, particularly when this system is facing critical challenges such as those seen in spacecraft’s structure or cryogenic tanks for example.
Satellites and spacecraft’s must be protected from unusual thermal amplitude encountered in space, from extremely low temperature faced while travelling under the shade of Earth to several hundreds of degrees faced while being exposed to the raw sunlight or to the heat of satellite thrusters for example. Cryogenic insulation is often used for transport and storage of liquefied gases at extremely low temperatures.
For instance, liquefied hydrogen is stored and transported at -253°C.
Multilayer insulation (MLI) is a technology allowing high performance insulation in a constraint volume and with an overall low impact on the weight of the insulated system. MLI products are made of a stack of layers of metallic foils and inorganic spacer. The metallic foils, often made of aluminum or titanium, are used to reflect the heat while preventing the transfer of radiant thermal energy through the insulant. The inorganic spacer is used for its ability to physically separate the metallic foils and therefore prevent conductive heat transfer through the system.
Quartzel veils are designed to be used as spacers in multilayer insulation, they are offering thin and lightweight solutions as spacers with the advantages of offering a low thermal conductivity, no outgasing under vacuum as well as a lower density than glass (-10%).
Multi layer insulation

Related markets