Viscose-based carbon fiber felt is manufactured from viscose/rayon staple fiber through needle punching, pre-oxidation, and high-temperature carbonization/graphitization.
Compared with PAN-based carbon felt, it offers ultra-low density, ultra-low thermal conductivity, ultra-high purity, and superior ablation resistance.
It is used as a core thermal insulation material for vacuum high-temperature furnaces.
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Product name: |
Viscose-based carbon fiber felt |
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Material: |
100% carbonized viscose/rayon fiber |
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Weight: |
100-3000 g/m2 |
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Thickness: |
1-10 mm |
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Width: |
1-2 m, or custom |
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Ash content: |
Standard: 3.8–4% , High-purity: ≤ 0.1% |
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Thermal conductivity: |
≤ 0.08 W/(m·K) |
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Porosity: |
90%–95% |
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Specific surface area: |
500–1600 m2/g |
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Continuous operating temperature: |
≤ 1500 °C |
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Instantaneous maximum temperature: |
1800 °C |
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Thermal shrinkage: |
≤ 2.5% (at 1200 °C, 24h) |
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Grade: |
Industrial grade |
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Chemical properties: |
Viscose-based carbon felt has a stable carbon skeleton structure with excellent chemical inertness. |
1. Extreme high-temperature resistance & excellent thermal insulation: stable under 2000–3300 °C in an inert atmosphere, with low thermal conductivity and energy-saving performance. Provides a stable thermal field with minimal shedding.
2. Ultra-low impurity content: ash content below 50 ppm, low alkali metal content, ideal for high-purity production of semiconductors and photovoltaic silicon.
3. Lightweight & flexible: density 0.085–0.11 g/cm³, easy to cut, wrap, and shape for complex furnace linings.
4. Corrosion resistance & anti-thermal scouring: resists acids, alkalis, and high-speed hot airflow, offering a long service life in vacuum environments.
5. Uniform conductivity & adsorption capacity: can be activated for gas/liquid filtration.
1. High-temperature thermal insulation for industrial furnaces
Used as lining insulation for monocrystalline silicon furnaces, SiC crystal growth furnaces, vacuum sintering furnaces, and metallurgical furnaces to stabilize the temperature field and reduce heat loss.
2. Aerospace thermal protection
Ablation-resistant thermal shielding materials for aircraft, rocket engine lining components, and vacuum thermal test chambers.
3. Electrochemical conductive electrodes
Serves as an electrode substrate for flow batteries, electrolytic tanks, and supercapacitors, benefiting from its rich porous structure.
4. Environmental adsorption and filtration
Activated felt for purifying acid/alkali waste gases, organic VOCs, and for adsorbing heavy metals in industrial wastewater.
5. Anti-static, heating, and electromagnetic shielding materials
Flexible heating components, anti-static gaskets, EMI shielding materials, and medical conductive substrates.
