Jul 23 , 2025
Polycrystalline alumina fiber products (such as blankets, boards, and modules) are essential high-performance insulation materials in modern sintering furnaces. These furnaces typically process ceramics, metal powders, and semiconductor materials at extremely high temperatures, with strict requirements for internal environmental purity.
1. Hot-Face Lining: In ultra-high temperature and contamination-sensitive environments, polycrystalline alumina fiber serves directly as the hot-face lining of the furnace chamber. Its high purity ensures no harmful impurities are released during sintering, which could otherwise affect product performance.
2. High-Temperature Backup Insulation: In some sintering furnaces, it acts as a backup insulation layer behind dense, heavy refractories, effectively reducing heat loss from the furnace body and improving energy efficiency.
3. Furnace Doors, Roofs, and Kiln Cars: Used to construct insulation modules for sintering furnace doors and roofs, as well as lightweight insulating structures for high-temperature kiln cars. This ensures these movable parts remain dimensionally stable and provide effective insulation at high temperatures.
4. Special Applications: In atmosphere-controlled sintering furnaces, its excellent chemical stability allows it to adapt to various atmospheres (e.g., oxidizing, reducing, or inert) while maintaining its insulating properties.
Extreme High-Temperature Resistance: Capable of stable, long-term operation from 1300°C up to 1700°C and beyond.
High Purity: With high alumina content, it causes no contamination to sintered products, making it ideal for electronic ceramics and semiconductor material sintering.
Excellent Insulation Performance: Its very low thermal conductivity significantly reduces energy consumption.
Low Heat Storage: Facilitates rapid furnace heat-up and cool-down, saving time.
Good Thermal Shock Stability: Resists cracking from rapid heating and cooling cycles.
Polycrystalline alumina fiber products, with their exceptional performance in extreme high-temperature and high-purity environments, are a critical insulation solution for achieving efficient, stable, and clean production in sintering furnaces.
