Porous ceramics have a huge porosity and low matrix thermal conductivity, so their most traditional application is as a thermal insulation material.
Traditional kilns and high-temperature electric furnaces are lined with porous ceramics. In order to increase its thermal insulation performance, the internal gas can also be evacuated.
The best thermal insulation material in the world is precisely this porous ceramic material.
Advanced porous ceramic thermal insulation materials can also be used for the thermal insulation of the outer shell of the space shuttle.
In addition, due to its porosity, it can also be used as a heat exchange material with sufficient heat exchange.