Carbon Felt for High-Temperature Insulation
As a trusted provider of graphite and carbon-based material solutions, we deliver high-quality carbon felt designed for thermal insulation, energy systems, and high-temperature applications. Industries worldwide rely on our felt materials for their consistent performance and dependable quality.
The terms carbon felt and graphite felt are often used interchangeably, but they refer to different stages of the same material. Carbon felt is the base material, while graphite felt is produced through a high-temperature treatment that improves thermal conductivity and structural stability. Depending on your needs, we also supply various grades of graphite carbon felt to meet specific performance requirements.
Choosing the right insulation material is critical for safety and efficiency. If you're unsure which type is best for your project, our technical team is ready to help. Contact us today for expert guidance and tailored recommendations.
Manufacturing process of Carbon Felt
Step 1. Raw Material Selection
Uses PAN (polyacrylonitrile), pitch, or rayon-based fibers7.
Step 2 . Needle Punching
Fibers are aligned and needle-punched into a non-woven mat for structural integrity
Step 3 . Pre-oxidation
Heated in air at 200-400°C to stabilize the fibers and prevent melting during carbonization.
Step 4. Carbonization
Low-Temp (600-1100°C)/High-Temp (1100-1500°C) Converts organic fibers into carbon in an inert (N₂) atmosphere.
Step 5. Graphitization
The carbonized felt is heated to 2000-3000°C in argon or nitrogen, transforming amorphous carbon into a crystalline graphite structure.
Step 6 . Post-Treatment
Surface treatments like coating, laminating with graphite paper, or hardening may be applied.
Features of Carbon Felt
Exceptional Thermal Stability:– Operates reliably up to 3000°C in inert environments without structural breakdown.
Low Thermal Conductivity: – Offers low thermal conductivity, as low as 0.15 W/m·K, ideal for heat-sensitive systems.
High Porosity & Lightweight Structure: – Soft felt weighs around 0.08–0.15 g/cm³, making it simple to cut and install.
High Purity and Low Ash Content: – High-purity structure with ash content below 0.01% ensures contamination-free operation.
Chemical Inertness: – Withstands acids, alkalis, and corrosive gases, especially under inert or reducing atmosphere
TAICHIRON@ Series rigid & Soft insulation
Balanced Performance for High-Temperature Solutions
SHJ CARBON presents TAICHIRON@ carbon felt, a series inspired by the harmony of yin and yang. Combining the flexibility of soft felt with the strength of rigid felt, TAICHIRON@ delivers reliable high-temperature insulation for demanding furnace and thermal applications. In vacuum and inert atmospheres, our carbon felt and graphite felt ensure low thermal conductivity, uniform heat distribution, and stable process conditions. Designed for high purity, durability, and long service life, TAICHIRON° reflects both technical excellence and the enduring balance required in advanced industries.
Thermal Insulation Rigid Felt
| Product | Bulk Density | Compressiv Strength |
e Thermal Conductivity (@1000℃) |
Ash Purification |
Maximum Operating Temperature |
| PAN-Based | 0.16g/cm³ | 0.25MPa | 0.35W/(m.k) | ≤20ppm | ≥2000℃ |
| PAN-Based | 0.2g/cm³ | 0.35MPa | 0.3W/(m.k) | ≤20ppm | ≥2000℃ |
| Viscose-Based (Long Fiber) |
0.18/cm³ | 0.25MPa | 0.3W/(m.k) | ≤20ppm | ≥2200℃ |
| Viscose-Based (Short Fiber) |
0.15/cm³ | 0.25MPa | 0.25W/(m.k) | ≤20ppm | ≥2200℃ |
Thermal Insulation Soft Felt
| Product | Bulk Density | Thermal Conductivity (@1000℃) |
Ash Purification |
Operating Temperature |
Available Sizes |
| PAN-Based | 0.13g/cm³ | 0.2W/(m.k) | ≤20ppm | ≥2000℃ | 10x1200*20000mm 5x1200*20000mm |
| PAN-Based | 0.15g/cm³ | 0.15W/(m.k) | ≤20ppm | ≥1800℃ | 3x1500*20000mm 10x1200*20000mm |
| Viscose-Based | 0.12/cm³ | 0.13W/(m.k) | ≤20ppm | ≥2200℃ | 3x1200*27000mm 5x1200*27000mm 10x1200*27000mm |
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Rigid Structure for Furnace Hot Zones: Graphite rigid felt is designed for furnace hot zone
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Reliable Insulation for High-Temperature Furnaces: Graphite soft felt is designed to deliver
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Excellent Thermal Insulation – Minimizes heat loss, maintaining stable temperatures in high-heat
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High-Temperature Resistance – Withstands up to 3000°C.Mechanical Strength – Excellent rigidity and
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Coated Method
Different industries demand different levels of protection, durability, and thermal performance from their carbon and graphite felt. That's why surface treatment isn't optional - it's essential. Whether you're working in vacuum furnaces, battery insulation, or high-temperature processing, the right surface finish helps extend product life, improve insulation efficiency, and reduce particle release in sensitive environments.
At SHJ Carbon, we've helped hundreds of clients across semiconductor, metallurgy, and energy storage choose the right felt for their needs. With decades of experience, we offer proven treatment options like graphite paper lamination, hardened coating, and carbon cloth reinforcement - each designed to meet specific performance goals. Contact us today for expert support in selecting the most effective surface treatment for your process.
Graphite with Unprocessed
High permeability, low cost
Graphite Foil Lamination
Seals pores, enhances insulation, provides smooth surface
Carbon-Carbon Plate Lamination
Superior structural strength, ideal for harsh thermal cycling environments
Application of carbon Felt
SHJ Carbon's graphite felt insulation and carbon felt insulation are engineered using advanced airlaid and needle-punching technology, ensuring highly uniform fiber distribution and optimal orientation. This process results in lightweight, soft, and low–heat capacity materials-making them ideal for demanding vacuum furnace applications.
Our soft graphite felt for insulating offers excellent thermal protection with minimal mass, helping systems maintain precise temperature control while reducing energy loss. These features make it especially suitable for high-purity and high-temperature environments.
Semiconductors & Photovoltaics
Thermal insulation for monocrystalline silicon and SiC crystal growth furnaces.
Fiber Optic Communications
We have obtained most of the professional certificates in the industry and insist on international standards of production.
Advanced Materials Processing
Heat shielding for sapphire growth and high-temperature purification furnaces.
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We're well-known as one of the leading carbon felt manufacturers and suppliers in China. If you're going to buy high quality carbon felt for sale, welcome to get free ample from our factory. For price consultation, contact us.
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