The meganism of Microtherm is microporous insulation, which is 90% air but the air is contained in minute cell that are smaller than the average free path of an air molecule. Thus the convection is reduced. It’s kind of nanotechnology in insulation. The main constituent is usually pyrogenic silica. The other more important ingredient is the opacifier that block the infrared radiation which is the main heat transfer at very high temperature.
It not only perfoms the best at high temperatures, but is also the best general thermal insulation at all temperatures from very high to cryogenic temperatures, which can be seen from the figure below.
As we can see from the figure microtherm offers a very low thermal conductivity at ambient temperature 0.021 W/m*k which is even lower than still air 0.025 W/m*k, while the EPS offers only 0.033 W/m*k. What is more important is that the thermal conductivity only increases a little when temperature increases while the other insulation materials increases very fast at high temperatures.
It’s used in cookings, refrigerators, transportations and buildings.
Comparing to my thesis of Econcore panel, microtherm offers more professional and concentrated performance at thermal insulation especially at high temperatures. But it has some reference value for my thesis because one ot the improvement we applied, which is pouring sillica into the cells of the panel, is very similar to the meganism of microporous insulation.
Here is the reference link: http://www.microtherm.uk.com/low/EXEN/site/hightemperature-insulation.aspx