Our polycrystalline fiber board is a superior product for high - temperature environments. It can reach a maximum working temperature of 1750 degrees. In high - temperature electric furnaces, it is a key component when used with silicon - molybdenum rods and silicon - carbon rods. It is highly regarded in industries such as the chemical industry for its ability to provide a stable high - temperature environment for chemical reactions and in the research institutions for high - temperature experiments.