The polycrystalline fiber board we produce is a high - quality refractory material. Its maximum working temperature of 1750 degrees makes it suitable for high - temperature electric furnaces used in various industries. Whether it is in the glass industry for glass melting or in the ceramics industry for firing, it can play an important role. And when combined with silicon - molybdenum rods and silicon - carbon rods, it can further enhance the performance of the high - temperature furnace.