Alumina fiber is a high-performance inorganic fiber primarily composed of Al₂O₃ (aluminum oxide). Known for its low density, high tensile strength, high modulus, and exceptional high-temperature resistance, it delivers outstanding corrosion resistance (including acid and alkali), oxidation resistance, electrical insulation, low thermal conductivity, and excellent dielectric properties.
Its superior performance makes it an ideal choice for demanding industries such as aerospace, defense, energy and chemical engineering, and automotive manufacturing.
Technical Features & Material Forms
Based on morphology, alumina fibers can be categorized into:
1. Long Fibers (Continuous Alumina Fibers)
2. Short Fibers
3. Alumina Fiber Whiskers
Exhibit high strength along with unique magnetic, electrical, and optical properties.
Suitable for functional applications in electronics, optics, and specialized composite materials.
Key Advantages of Alumina Fiber
Temperature Resistance: Maintains integrity above 1,300°C.
Corrosion Resistance: Performs in acidic, alkaline, and oxidative environments.
Low Thermal Conductivity: Ideal for thermal barrier coatings and insulation.
Electrical Insulation: Reliable performance in electrical and electronic applications.
Lightweight Strength: Combines low density with high modulus for aerospace-grade engineering.
Applications of Alumina Fiber
Alumina fiber is widely used in extreme-environment engineering:
Fiber-reinforced ceramic matrix composites (CMCs)
High-temperature wire conduits & cable insulation
Engine exhaust nozzles & sealing flaps
Thermal insulation tiles & refractory linings
Mobile device backplates for structural stability
Substrates for three-way catalytic converters
Power battery thermal barriers and protective casings
For more detailed technology information, message us at info@slchemetech.com.
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Performance Indicators of Alumina Short Fibers vs. Continuous Fibers
| Product | Alumina short fiber | Alumina continuous fiber |
| Al2O3 content （%） | 72~95 | 72~99 |
| SiO2 content （%） | 5~28 | 0~28 |
| Melting point (℃) | > 1800 | > 1800 |
| Long-term service temp. (℃) | 1000~ 1600 | 1000~ 1600 |
| Density （g/cm3） | 3. 1~3.8 | 2.9~3.9 |
| Avg. diameter range (μm） | 3~7.5 adjustable | 7~ 14 adjustable |
| Monofilament tensile strength （MPa） | ≥1200 | ≥1700 |
| Monofilament elastic modulus （GPa） | ≥100 | 170~360 |
Why Choose SL Chemtech Alumina Fiber?
As a trusted alumina fiber manufacturer and supplier, SL Chemtech delivers:
Advanced Manufacturing Technology for consistent fiber quality.
Multiple Fiber Types to meet diverse industrial needs.
Custom Solutions for high-performance applications.
Global Supply Capability with reliable logistics support.
