Withstanding temperatures of 3000℃! Glue-based graphite felt: A hidden treasure in renewable plants?

Jun 25,2025

What is viscose-based graphite felt?

It is made from natural cellulose (wood pulp, cotton linters, etc.) to produce viscose fiber (similar to rayon).

After multiple high-temperature carbonization processes:

Pre-oxidation: Heated to 200-300℃ to stabilize the fiber and prevent combustion.

High-temperature carbonization: Heated to 1200-2000℃ in an inert gas, volatilizing hydrogen and oxygen elements in the fiber, leaving a pure carbon skeleton.

Graphite: Further heated to 2500-3000℃, carbon atoms are arranged into a regular graphite structure, further upgrading its performance.

What are the characteristics of viscose-based graphite felt?

High-temperature resistance

In high-temperature environments, stainless steel begins to redden and soften at 800℃, and ceramic fiber crumbles upon contact at 1600℃, but viscose-based graphite felt can maintain its shape at 2000℃.

Lightweight and heat-insulating

Low density, 0.1~0.3g/cm³, lighter than ordinary foam plastics.

Conductive and heat-conductive

Strong conductivity, in some materials, it can be used as a substitute for graphene.

Corrosion resistance

Resistant to strong acids, strong alkalis, and organic solvents.

Flexible and moldable

Can be sewn freely, rolled into cylinders, and easily folded. It can even wrap complex parts like cloth.

Environmentally friendly and safe

Smokeless and non-toxic when exposed to open flames, and does not release harmful substances at high temperatures. Only CO₂ is produced after incineration.

What are the applications of viscose-based graphite felt?

Industrial field

Single crystal silicon smelting furnace, producing mobile phone chips, etc.;

Vacuum sintering furnace, refining aerospace alloys, etc.

New energy field

Used as a lithium battery anode, combined with graphene to improve the battery capacity and range of vehicles.

Viscose-based graphite felt is softer, cheaper, and more environmentally friendly than polyacrylonitrile (PAN)-based graphite felt. Because the raw material of viscose-based graphite felt is viscose fiber, it is inherently soft, the raw material comes from renewable plants, the cost is low, the production process has less pollution, and it is biodegradable after disposal.

Compared with ceramic fiber felt, viscose-based graphite felt has stronger thermal shock resistance, does not crack after repeated hot and cold cycles, and has a long lifespan. Ceramic fiber has insulation properties, but viscose-based graphite felt has conductivity, making it suitable for use in batteries and electronics.

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Polyacrylonitrile (PAN)-based graphite felt - a good conductor of electricity and heat