Determinants of temperature resistance of mica bord

The temperature resistance of mica board does not depend on its material, but on the substrate used. Is it silicone, epoxy, or shellac.

Silicone mica board is the real high temperature resistant mica board. Its temperature resistance can generally reach more than 500 degrees Celsius. As for the mica board with epoxy glue, we know that the epoxy glue will soften at 150 degrees. It is conceivable that if a mica board with epoxy resin glue is used, how can it be a high temperature resistant mica board. Shellac mica board is generally suitable for electrical appliances, and the electrical performance is stronger. The temperature resistance is far from the temperature resistance of the silicone mica board.