Properties and Applications of Graphite felt–CFCCARBON LTD
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Due to the different raw blanket felt, the graphite felt is divided into 3 kinds: Petro coke-based, Pan-based graphite felt and Rayon-based graphite felt. The main application is used as insulation, insulating materials for monocrystalline silicon smelting furnace. In the chemical industry, it can be used as high-purity corrosive chemical reagents filter material.
Definition of graphite felt
After high temperature above 2000 ℃ in the vacuum or inert atmosphere, the carbon felt turned into graphite felt. The carbon content is much higher than carbon felt, its 99% min. There is production and supply at end of the 1960s in the world. Due to the different raw blanket felt, the graphite felt is divided into 3 kinds: Petro coke-based, Pan-based graphite felt and Rayon-based graphite felt.
Japanese produces mainly Petro coke-based graphite felt, Europe and the United States are basically Rayon graphite felt, while in China, we usually use Pan-based material to produce graphite felt. The process is this: We cut Pan-based carbon felt or Rayon-based carbon felt into the required size, rolled into a cylindrical container made of graphite material, the graphite container placed in high-temperature furnace (high-temperature furnace for graphite tube furnace, High-frequency induction furnace or other heating form of high-temperature furnace), vacuum or high pure inert gas protection to 100 ~ 300 ℃ / h heating rate to 2200 ~ 2500 ℃, then naturally cooled to 100 ℃ , then we got graphite felt.
Specification for Graphite Felt
Specifications Pan Graphite Felt Rayon Graphite Felt
Length (mm) ≥1500 ≥2000
Width (mm) 1000 ±200 1000 ±200
Thickness (mm) 3~ 15 3-15
Properties
Itemspecification
Bulk density g/cm30.12～0.18
Carbon content %>99.9
Thermal conductivity (1450℃)W/(mk)0.12～0.18
Specific resistance Ωmm2/m0.16-0.21
N/cm2portrait≥0.13
level≥0.06
tensile strength Mpa0.14-0.30
Ash content %≤0.02
Processing temperature ℃2200
Environment
To useair ℃≤400
vacuum ℃≥2500
Inertia air ℃≥2800
Packing, storage and delivery:
Packed in plastic film, then packed in carton.
In the storage, don’t break the plastic film, At dry and ventilated places, preventing damps and rains
Shipper as non-dangerous goods.
Pan-based graphite felt stronger than the Rayon-based graphite felt, strong antioxidant capacity, but the flexibility is poor, and with higher bulk density. In addition to their high purity, high temperature, corrosion resistance, non-melting properties, there are flexible, can be folded, cut and can be used graphite yarn suture and other advantages. Graphite felt main application is used as a single crystal silicon smelting furnace insulation material. In the chemical industry can be used as high-purity corrosive chemical reagents filter material. The application temperature Graphite felt can up to 3000 ℃ or so in non-oxidizing atmosphere conditions.
Contact Us
ADD: Yizhuang Economic Development Zone, Beijing 100176, China.
Fax: +86 10 80828912
Website: www.cfccarbon.com
www.htmagroup.com
Email: potter@cfccarbon.com
sales@htmagroup.com
Marketing center: +86-17701349487
Human Resources: +86-15313026852
carbon carbon composite, graphite, graphite felt http://www.cfccarbon.com/
