Ceramic fiber sealing materials are high-temperature sealing products mainly composed of alumina (Al₂O₃) and silica (SiO₂). They are manufactured through high-temperature melting, fiber spinning, needling, and weaving processes. Common forms include ceramic fiber ropes, tapes, cloths, boards, and packings.
The most distinctive feature of ceramic fiber sealing materials is their outstanding heat resistance — they can operate continuously above 1000°C, and withstand short-term exposure up to 1260°C. This makes them one of the most reliable materials for sealing and thermal insulation in high-temperature equipment.
Key Features
- Low Thermal Conductivity: Effectively reduces heat loss and improves energy efficiency.
- Excellent Chemical Stability: Performs well in most acidic and alkaline environments without oxidation or aging.
- High Flexibility & Lightweight: Easy to install, cut, and shape for customized sealing applications.
- Superior Thermal Shock Resistance: Maintains structural integrity even under rapid temperature changes.
- Eco-Friendly and Asbestos-Free: Non-toxic, harmless, and safe to replace traditional asbestos materials.
Applications
Ceramic fiber sealing materials can be processed into gaskets, sealing strips, and insulation wraps to suit different equipment shapes. They are widely used in:
- Industrial furnaces and kiln doors
- Hot air ducts and boiler insulation
- Combustion chambers and heat treatment equipment
- Valves, flanges, and expansion joints
- Fireproof and high-temperature protective systems
Conclusion
By combining excellent heat resistance, chemical stability, and environmental safety, ceramic fiber sealing materials provide an efficient and reliable solution for modern high-temperature sealing applications. They are increasingly adopted in industries such as metallurgy, power generation, petrochemicals, shipbuilding, and fire protection equipment, offering both performance and sustainability advantages.