Our polycrystalline fiber board is designed for high - temperature furnace applications. It has a remarkable maximum working temperature of 1750 degrees. In the field of industrial furnaces, it is an excellent choice. It can be used to construct furnace linings and can work in harmony with silicon - molybdenum rods and silicon - carbon rods. This product has been widely used in the metallurgy, ceramics, and glass industries, providing stable high - temperature environments and excellent thermal insulation.