What Is The PAN And Rayon Graphite Felt Used For ?

FAQ 1：What is graphite felt and why is it used for high-temperature insulation?
Graphite felt, also known as graphite fiber felt or graphite mat, is a type of high-temperature insulation material made from carbon fibers. Due to its excellent thermal and chemical stability, it is widely used in various high-temperature applications, such as furnace insulation, thermal insulation for aerospace and marine engineering, and as an electrode material in fuel cells.
Graphite felt has many advantages over other types of insulation materials such as ceramic fibers and refractory bricks. It is lightweight, flexible, easy to install and has a wide temperature range. It can withstand temperatures up to 3000°C in a vacuum atmosphere and up to 2200°C in air. Moreover, it has excellent thermal conductivity, making it an ideal material for use in high-temperature applications.
FAQ 2: How is graphite felt made?
Graphite felt is produced from high-purity carbon fibers that are mechanically interlocked and needled together to form a uniform web of felt. The fibers used in graphite felt production are usually made from rayon, polyacrylonitrile (PAN), or petroleum pitch. The fibers are first processed to remove impurities, and then are oxidized at high temperatures to improve their strength and thermal properties.
After oxidation, the fibers are cut to a uniform length and then passed through several processes, including carding and needle-punching, to form a continuous web of felt. The felt is then impregnated with a phenolic resin to improve its mechanical strength and stability. Finally, it is carbonized at high temperatures to produce graphite felt with the desired thermal conductivity, density, and mechanical properties.
FAQ 3: What are the advantages of using graphite felt for high-temperature insulation?
Graphite felt has many advantages over other types of insulation materials, making it an ideal material for use in high-temperature insulation applications. Firstly, it has excellent thermal conductivity, which helps to reduce heat loss and increase energy efficiency.
Secondly, it is lightweight and flexible, which makes it easy to handle and install in complex-shaped applications. Thirdly, it has excellent dimensional stability, even at high temperatures, and does not shrink or deform like other insulation materials such as ceramic fibers.
Fourthly, it is highly resistant to thermal shock and has a high melting point, which makes it ideal for use in harsh environments with extreme temperatures and rapid temperature changes. Finally, it is highly durable and has a long service life, which helps to reduce maintenance costs and improve overall operational efficiency.