Continuous polycrystalline ceramic oxide fibers represent the most advanced refractory fiber technology.
Ultra-High Temperature Resistance – Stable up to 1600°C (2912°F) in oxidizing environments
Low Thermal Conductivity – 0.1–0.2 W/m·K (at 1000°C)
Chemical Inertness – Resists acids, alkalis, and molten metals
Flexible & Weavable – Can be made into fabrics, ropes, or composites
Alumina continuous fiber, with alumina and silica as its main components, is prepared by the "sol-gel" process. It can be used in high-temperature environments above 1000°C for a long time.
Sol-Gel Precursor: Aluminum salts dissolved in water, spun into green fibers.
Heat Treatment: Fired up to 1400°C to convert to pure α-Al2O3.
Post-Processing: Sized for weaving or chopped for composites.
