Our polycrystalline fiber board is the key to high - temperature furnace performance. With a maximum working temperature of 1750 degrees, it is suitable for various high - temperature applications. It can be used in high - temperature electric furnaces in combination with silicon - molybdenum rods and silicon - carbon rods. It is widely used in industries like metallurgy, ceramics, glass, and chemical industries, providing excellent thermal insulation and a stable high - temperature environment.