Graphite Felt

Why Choose Zibo Jinpeng Composite Materials Technology Co., Ltd.？

Zibo Jinpeng Composite Materials Technology Co., Ltd. is located in Wangcun Town, Zibo City, Shandong Province, which is a famous graphite carbon industry base in China. Our company mainly produces and processes graphite carbon materials. It has a complete production process and marketing system. It has been engaged in the production and processing of graphite products for more than 20 years. It has built its own production and processing process system and has three national invention patents. It has established extensive technical cooperation relationships with well-known domestic university laboratories such as Shandong University of Technology and Northwestern Polytechnical University and has produced graphite parts for many well-known companies. It has its own related industrial R&D system and testing and testing equipment.

Professional Technical Team

We have more than 20 years of experience and dozens of senior engineers in the graphite R&D, production and manufacturing industry. Whether it is the research and development of graphite raw materials, the precise processing of graphite parts, and the graphitization and purification of related products, our high-level technical team can customize professional solutions for you.

Wide Range of Applications

Our product application range includes the glass industry, high temperature furnace industry, refractory industry, plastics industry, semiconductor electronics industry, photovoltaic industry, pharmaceutical and chemical industry, aerospace industry, metallurgical industry, automotive industry, renewable energy industry, textile machinery manufacturing, glass machinery manufacturing.

Professional Service

Fully communicate with customers before sales, provide professional product suggestions and technical support according to customer needs, and ensure the high quality of products in manufacturing, packaging, logistics and other aspects. During the sale period, Zibo Jinpeng Graphite Factory not only provides on-time delivery services but also provides comprehensive after-sales technical support such as lifetime warranty, technical consultation and problem diagnosis to ensure customer satisfaction and trust. In terms of after-sales service, we attach great importance to customer feedback, promptly solve problems and concerns raised by customers, and continuously improve service quality and efficiency based on customer experience and suggestions.

Wide Product Range

Our main products are Graphite heating elements, Graphite felt & carbon felt & rigid felt, Graphite crucible, etc. At present, North America, Eastern Europe and Southeast Asia are Zibo Jinpeng's main international cooperation destination markets. Thanks to stable product quality and excellent material properties, the graphite products produced by Zibo Jinpeng have a high market share in the fields of smelting, chemical industry, and high-temperature industrial furnace accessories.

What is Graphite Felt?

Graphite felt is a type of high-temperature insulating material that is made from carbon fibers. It has a soft, flexible texture and can be easily cut and shaped into different forms. Graphite felt is used in a variety of industrial applications, including insulation for furnaces, kilns, and other high-temperature equipment, as well as in the manufacture of advanced batteries, fuel cells, and other energy storage devices. It is highly resistant to heat and chemical corrosion, making it an ideal material for harsh industrial environments.

Features of Graphite Felt

*Easy to cut and install.

*Low density and thermal mass.

*High thermal resistance.

*Low ash and sulfur content.

*No outgassing.

Types of Graphite Felt

Pan Graphite Felt

PAN (PolyAcrylNitrile) is lower in cost.

PAN has coarser fiber and larger fiber diameter = Lower Surface area.

PAN is stiffer and has an "ichier" feeling. Rayon is more flexable and less irritating to the skin

For heat treating applications, PAN carbon felt is the best price.

Rayon Graphite Felt

Rayon is lower in Thermal Conductivity than PAN at temperatures greater than 1800°C.

For handling ease and ultra high temperatures, Rayon is the best choice.

Difference between Pan Graphite Felt&Rayon Graphite Felt

Polyacrylonitrile, also known as PAN, is manufactured with larger diameter course fibers resulting in lower surface area and better oxidation resistance. The flexible material is stiffer and less soft to the touch in comparison to Rayon. The thermal conductivity of Rayon is lower than PAN at temperatures greater than 3272℉(1800℃)

Advantages of Graphite Felt

01.

High Thermal Conductivity:

Graphite felt has excellent thermal conductivity, which makes it useful in high-temperature applications. It can conduct heat up to 800°C, which is much higher than other materials like ceramics and metals.

02.

Lightweight:

Graphite felt is lightweight, which makes it easy to use and transport. This is especially important in aerospace and other industries where weight is a critical factor.

03.

High Resistance to Corrosion:

Graphite felt is highly resistant to corrosion, making it ideal for use in harsh or corrosive environments. This makes it an excellent choice for chemical processing applications.

04.

High Porosity and Permeability:

Graphite felt has high porosity and permeability, which makes it useful as a filter medium. It can be used to remove impurities from liquids and gases.

05.

Low Electrical Resistance:

Graphite felt has low electrical resistance, which makes it useful as an electrical conductor in certain applications. It can be used as an electrode material in batteries and fuel cells.

06.

Flexible:

Graphite felt is flexible and can be shaped into various forms, making it highly adaptable for different applications.

07.

Long Service Life:

Graphite felt has a long service life due to its high resistance to heat, corrosion, and wear, making it a cost-effective choice over time.

Application of Graphite Felt

Furnace insulation & parts.
Heat shields & sinks.
Backing strips for soldering & welding.
Cathode in flow battery applications.
Reaction surface for other electro-chemical processes.
Glass blowing pads & plumber pads.
Wicks in ultralight stoves.
Automotive exhaust linings.
Thermal insulators.

Working principle of Graphite Felt

Graphite felt is a highly porous material composed of carbon fibers that are intertwined and overlapped to create an interconnected network. The working principle of graphite felt is based on its unique structural characteristics and properties.

Graphite felt is an excellent thermal and electrical conductor due to the strong covalent bonds between carbon atoms. When used as a heating element, it can efficiently transfer electrical energy into thermal energy, allowing for rapid and precise heating of the surrounding materials.

Additionally, graphite felt has excellent chemical resistance and thermal stability, making it an ideal material for high-temperature applications. It can function at temperatures as high as 3000°C without significant degradation, making it perfect for use in extreme environments like the aerospace and nuclear industries.

Graphite felt is used in various applications ranging from thermal insulation, fuel cells, flow batteries to hydrogen storage. It can also be used as a catalyst support or electrode material in chemical reactions due to its high surface area and excellent conductivity.

Overall, the working principle of graphite felt relies on its unique structure and properties, which makes it an ideal material for various industrial applications.

Treatment of Graphite Felt

Among many carbon materials, the carbon/graphite felt has the most application prospect. Compared with the metal material, the graphite felt has many advantage such like: large specific surface area, good flexibility, easy to machine and install and the price is low, so it's more suitable to be as electrode material in the vanadium redox flow battery.

Now the problem is how to improve the electrochemical activity of graphite felt. The research and development mainly bifurcated graphite felt modification and the preparation of Graphite felt composite electrode.

1) the modification of graphite felt is to improve the property through modify the surface physical structure (specific surface area, surface morphology) and chemical structure (surface functional group).

It can be divided into two types: oxygen functional groups and nitrogen functional groups.

Use nitrate to treat the carbon/graphite felt, carbon fiber, carbon sheet and graphite rod etc, the result showed that to the graphite/carbon felt and carbon fiber, the content of oxygen has a large increase, however, to the carbon sheet and graphite rod, the content of oxygen has a decrease.

The high content of oxygen does not mean high activity, some researchers believe that appropriate content of oxygen (4.0%~5.0%)is good to the reaction of vanadium battery.

Nitrogen element can change the energy level structure of carbon/graphite material, and to make it with high electrochemical activity. Compared with the oxygen functional groups, it can improve not only electrical conductivity of the material but the hydrophily.

2) the preparation of Graphite felt composite electrode is to increase the electrochemical activity through complex catalysis on the surface of the graphite felt.

The catalyst includes carbon nano-tube, grapheme and metal base (Iridium, Bismuth, Platinum alloy, Tungsten oxide etc.)

Impermeable Fuel Cell Graphite Bipolar Plate

Comparison between Graphite felt Vs Carbon felt

Graphite felt is a rayon based material that is an ideal choice for vacuum furnaces or process temperatures above 2000° C. Graphite felt is produced in 0.25” and 0.50” thicknesses in widths up to 1.2 Meters, is typically processed to temperature above 2200° C, and can be purified to less than 20 ppm total ash content.

Carbon felt is a lower-cost alternative to Graphite felt for applications where chemical purity is not as critical. Carbon felt is typically processed to a minimum temperature of 1400° C.

Carbon and Graphite felt is a soft flexible high-temperature refractory insulation typically used in vacuum and protected atmosphere environments up to 5432℉ (3000℃). High purity felt heat-treated to 4712℉(2600℃) and Halogen Purification are available for custom production orders. Additionally, the material can be used in oxidizing temperatures up to 752℉ (400℃).

Our Factory

We have a complete factory production, quality supervision and delivery.

productcate-1-1

Our Certificate

At present, we have obtained the following certificates.

productcate-1-1

Ultimate FAQ Guide to Graphite Felt

Q: 1. What is graphite felt?

A: Graphite felt is a flexible and lightweight material made from graphite fibers. It is commonly used in high-temperature applications and in the manufacturing of carbon and graphite products.

Q: 2. What are the properties of graphite felt?

A: Graphite felt has excellent thermal stability, low thermal conductivity, and high heat resistance. It is also chemically inert, lightweight, and has good dimensional stability.

Q: 3. What are the different types of graphite felt?

A: There are two main types of graphite felt: rigid and flexible. Rigid graphite felt has high density and is used for high-temperature insulation, while flexible graphite felt has low density and is used for gaskets, seals, and filtration.

Q: 4. What are the applications of graphite felt?

A: Graphite felt is used in a wide range of applications, including heat insulation, filtration, fuel cells, and aerospace components.

Q: 5. How is graphite felt produced?

A: Graphite felt is produced by carbonizing and graphitizing rayon, pitch, or polyacrylonitrile fibers. The fibers are then formed into a felt-like structure using needle-punching or chemical bonding.

Q: 6. How is graphite felt processed?

A: Graphite felt can be processed by compression molding, resin impregnation, or vacuum infiltration. These processes can enhance its mechanical strength and heat resistance.

Q: 7. What is the maximum temperature that graphite felt can withstand?

A: Graphite felt can withstand temperatures up to 3000°C in an inert atmosphere and up to 2000°C in an oxidizing atmosphere.

Q: 8. Can graphite felt be recycled?

A: Yes, graphite felt can be recycled by treating it with chemicals to remove any impurities and then reusing it.

Q: 9. Is graphite felt hazardous to health?

A: Graphite felt is generally considered safe to handle and use, although exposure to dust and fibers can cause respiratory irritation.

Q: 10. How does graphite felt compare to other high-temperature materials?

A: Graphite felt has several advantages over other high-temperature materials, such as ceramic fiber, including higher thermal stability, better mechanical strength, and lower thermal conductivity.

Q: 11. What are the benefits of using graphite felt in fuel cells?

A: Graphite felt is an essential component of fuel cells, as it serves as the catalyst support and gas diffusion layer. Its high porosity and low electrical resistance ensure efficient fuel cell operation.

Q: 12. What type of filtration can graphite felt be used for?

A: Graphite felt can be used for both liquid and gas filtration. It is commonly used for filtration in the chemical, pharmaceutical, and food industries.

Q: 13. What are the advantages of using graphite felt in insulation?

A: Graphite felt has low thermal conductivity and high thermal stability, making it an excellent material for high-temperature insulation applications.

Q: 14. What is the difference between rigid and flexible graphite felt?

A: Rigid graphite felt has higher density and is generally used for insulation in high-temperature applications, while flexible graphite felt has lower density and is used for gaskets, seals, and filtration applications.

Q: 15. How do you cut graphite felt?

A: Graphite felt can be cut using a sharp blade or scissors, although it is recommended to wear gloves and a mask to prevent skin irritation and inhalation of dust.

Q: 16. What are the key properties of graphite felt for use in thermal insulation?

A: The key properties of graphite felt for use in thermal insulation are low thermal conductivity, high thermal stability, and good dimensional stability.

Q: 17. What are the benefits of using graphite felt in aerospace components?

A: Graphite felt is used in aerospace components as it is lightweight, durable, and has excellent heat resistance. It is used for insulation in rocket engines, thermal protection systems, and re-entry vehicles.

Q: 18. Can graphite felt be used for sound insulation?

A: Graphite felt is not generally used for sound insulation, as its low density and open-cell structure make it better suited for thermal insulation and filtration applications.

Q: 19. What are the main factors to consider when selecting graphite felt?

A: The main factors to consider when selecting graphite felt include the application requirements, operating temperature, chemical resistance, and mechanical strength requirements.

Q: 20. What is the density range of graphite felt?

A: The density range of graphite felt typically ranges from 0.1 g/cm³ to 0.25 g/cm³ for flexible felt and from 0.4 g/cm³ to 1.0 g/cm³ for rigid felt.

Q: 21. What is the thickness range of graphite felt?

A: The thickness range of graphite felt typically ranges from 0.25 mm to 10 mm, although thicker or thinner felts can be produced on request.

Q: 22. What is the porosity range of graphite felt?

A: The porosity ranges of graphite felt typically ranges from 75% to 99%, depending on the specific application and manufacturing process.

Q: 23. How is graphite felt used in fuel cell applications?

A: Graphite felt is used in fuel cell applications as the gas diffusion layer and catalyst support. It ensures efficient transfer of gases and provides a stable platform for the fuel cell reaction.

Q: 24. Can graphite felt be customized to specific applications?

A: Yes, graphite felt can be customized to specific applications by adjusting the density, porosity, thickness, and surface characteristics.

Q: 25. What are the key benefits of using graphite felt in filtration applications?

A: The key benefits of using graphite felt in filtration applications are low resistance to gas flow, high filtration efficiency, and the ability to withstand high temperatures and corrosive environments.

Q: 26. What types of chemicals is graphite felt resistant to?

A: Graphite felt is resistant to most strong acids, bases, and organic solvents, making it an excellent material for use in chemical processing and filtration applications.

Q: 27. Is graphite felt a good electrical conductor?

A: Graphite felt is a good electrical conductor, although its electrical properties vary depending on the manufacturing process and operating conditions.

Q: 28. Can graphite felt be used in vacuum applications?

A: Yes, graphite felt can be used in vacuum applications as it has low outgassing properties and is chemically inert, making it suitable for use in vacuum chambers and in high-temperature applications.

Q: 29. How is graphite felt cleaned?

A: Graphite felt can be cleaned using a vacuum cleaner or by washing it with water and a mild detergent. It is important to avoid using harsh chemicals or high-pressure water, as this can damage the felt.

Q: 30. How does graphite felt compare to other high-temperature materials in terms of cost?

A: Graphite felt is generally more expensive than other high-temperature materials, such as ceramic fiber, but its superior properties, such as high thermal stability and good mechanical strength, make it a cost-effective choice for many applications.

As one of the leading graphite felt manufacturers and suppliers in China, we warmly welcome you to wholesale high-grade graphite felt from our factory. All customized products are with high quality and competitive price. precision graphite heating elements, laboratory graphite heating elements, graphite complex shaped mould