Polycrystalline Mullite Fiber
Polycrystalline mullite fiber (PCW) is a high-performance refractory insulation material designed for continuous service in the 1400–1600 °C range and beyond. Thanks to its fine crystalline mullite structure, PCW combines very low linear shrinkage, low thermal conductivity, and excellent chemical stability in both oxidizing and reducing atmospheres. In demanding applications—such as steel reheating furnaces, glass furnace crowns, aluminum melting furnaces, and advanced thermal equipment—PCW products (bulk, blankets, modules, and boards) provide a long-life, lightweight lining solution where conventional ceramic fiber or lower-temperature bio-soluble fibers can no longer meet performance or lifetime requirements.
