Graphite Rigid Felt
High-purity graphite rigid felt for extreme temperature environments.
Low thermal conductivity, reducing energy loss in high-heat applications.
Customizable shapes: boards, cylinders, and 3D forms for complex designs.
Superior durability: resistant to thermal shock and erosion.
Optional surface treatments for enhanced protection and performance.
Description
Graphite Rigid Felt: High-Performance Thermal Insulation
Graphite rigid felt is a premium thermal insulation material designed for ultra-high-temperature and high-precision applications. Manufactured by integrating graphite foil, high-purity graphite felt, and carbon fiber reinforcement into a rigid composite, then purified at temperatures up to 2800 °C, it delivers exceptional purity, low thermal conductivity, and outstanding resistance to thermal shock and gas-flow erosion. For engineers in the electronics, semiconductor, and solar PV industries, as well as operators of vacuum and inert-gas furnaces, it solves the critical challenge of maintaining stable, energy-efficient insulation where ordinary materials fail - backed by SHJ CARBON's proven expertise and strict quality control.
What Is Graphite Rigid Felt?
Graphite felt is made from carbon fibers, which originate from organic precursors such as polyacrylonitrile (PAN), pitch, or rayon. These fibers are produced through high-temperature treatments - including pre-oxidation, carbonization, and sometimes graphitization - resulting in a material with extremely high carbon content and purity. Unlike woven carbon fabrics, graphite felt is created through non-woven processes like needling or air-laying, where the fibers are randomly oriented and entangled into a porous, interconnected network. This structure makes it lightweight, uniform in properties across all directions, and easy to cut or shape, providing the foundation for the rigid, self-supporting insulation materials used in demanding high-temperature environments.
Key Features & Benefits
- High-Purity Carbon – Produced through secondary purification at ultra-high temperatures, delivering outstanding chemical stability under extreme conditions.
- Low Thermal Conductivity – Keeps heat where it's needed, improving energy efficiency in high-temperature furnaces.
- Thermal Shock Resistance – Withstands rapid temperature changes without cracking or losing structural integrity.
- Resistance to Erosion & Ablation – Performs reliably even under high-velocity gas flow in vacuum or inert gas environments.
- Dimensional Stability – Holds its shape over long service cycles, ensuring a precise fit and easier installation.
- Flexible Customization – Supplied as boards, cylinders, or complex 3D forms to meet specific equipment designs.
- Enhanced Service Life Options – Available with edge sealing, corrosion protection, or graphite foil lamination.
TAICHIRON@ Series rigid & Soft insulation
| 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℃ |
Applications for graphite rigid felt
in High-Temperature Industries
Graphite rigid felt is widely used wherever stable, high-temperature insulation is critical. In electronics manufacturing, it provides precise thermal control for circuit board production and component sintering. The semiconductor industry relies on it in crystal growth systems, wafer processing, and vacuum chamber insulation. In the solar photovoltaic sector, it serves as a dependable lining for both polycrystalline casting furnaces and single-crystal growth equipment.
in Thermal Management
It's also a trusted choice for vacuum and inert gas furnaces, offering structural stability and consistent insulation in ultra-high-temperature sintering and brazing. Heat-treatment and induction furnaces benefit from its ability to maintain uniform temperatures, while welding and soldering operations use it as backing strips, heat shields, and work surfaces. In automotive manufacturing, it's applied in high-temperature exhaust linings and other thermal management components where durability and heat resistance are non-negotiable.
Why Choose SHJ CARBON
Technology First
We offer a variety of transmission components
25+ Years of Industry Experience
Proven expertise in carbon and graphite insulation for high-tech manufacturing.
Trusted by Top Manufacturers
Long-term supplier to leading electronics, semiconductor, and solar PV companies.
Custom Engineering Support
Tailored designs in boards, cylinders, and complex 3D shapes to match exact specifications.
Advanced Production & Purification
Secondary high-temperature treatment up to 2800 °C for exceptional purity.
Surface Treatment & Customization Options
Different industries place unique demands on the protection, durability, and thermal performance of graphite felt and rigid felt. For this reason, surface treatment isn't just an add-on - it's a vital step in ensuring the material performs as expected. In applications such as vacuum furnaces, battery insulation systems, or high-temperature processing, the right surface finish can significantly extend service life, improve insulation efficiency, and help minimize particle release in sensitive environments.
|
Surface Treatment Type |
Protection Against Dust |
Airtightness |
Surface Protection |
Shock Resistance |
Key Advantages |
|
No Surface Treatment |
– |
– |
– |
– |
– |
|
Graphite Paper Lamination |
○ |
○ |
○ |
○ |
Good air permeability and low cost |
|
Carbon Cloth Lamination |
○ |
○ |
○ |
○ |
Anti-dust penetration and heat loss |
|
Special Coatings |
◎ |
◎ |
◎ |
◎ |
High protection strength, long service life |
|
Special Coatings (Enhanced) |
◎ |
◎ |
◎ |
◎ |
Anti-dust penetration, high protection performance, high purity |
At SHJ CARBON, we provide a full selection of treatment and customization options. These include edge sealing to reduce particle shedding, corrosion-resistant coatings for aggressive atmospheres, laminated graphite foil layers to increase structural strength, and carbon cloth or graphite foil lamination for added surface stability. We also offer 3D shaping to fit complex furnace designs with precision. From standard finishes to specialized protective coatings, every treatment is tailored to your operating conditions, delivering reliable performance and longer maintenance cycles.
FAQs for Graphite Rigid Felt
Graphite rigid felt manufacturing varies by region. Japan predominantly uses pitch-based materials, Europe and the U.S. favor rayon-based, and China relies on PAN-based products. PAN-based felts are known for their high strength and oxidation resistance, making them ideal for high-temperature applications. Rayon-based felts are more flexible but have lower strength. In single-crystal silicon furnaces, PAN-based felts are often combined with graphite composites for improved erosion resistance and heat stability.
PAN-based felts offer higher mechanical strength, making them ideal for structural stability. Rayon-based felts are better for ultra-high temperatures and provide superior thermal insulation, making them suited for clean environments like crystal growth furnaces.
Graphite rigid felt can last for thousands of cycles in a controlled environment, with factors like temperature and handling influencing its longevity. Proper surface treatments can further extend its service life.
Yes, we offer tailored solutions, including custom shapes (boards, cylinders, and 3D forms) and additional surface treatments such as lamination and corrosion protection to suit your specific needs.
Our MOQ varies based on size and customization. We offer flexible options for both small and large orders, including prototypes and bulk supply agreements.
Hot Tags: graphite rigid felt, China, suppliers, manufacturers, factory, buy, price, for sale, free sample, high purity graphite block, CFC channel, Graphite rigid felt, Graphite heater, carbon carbon composite, graphite crucible for induction furnace
