Properties and Uses of Graphite


Carbon crystals

Carbon crystals

Graphite is a crystal of carbon and a non-metallic material with silver gray color, soft texture and metallic luster. The Mohs hardness is 1-2, the specific gravity is 2.2~2.3, and the unit weight is generally 1.5~1.8.

Very high melting point

Very high melting point

The melting point of graphite is extremely high. It tends to melt when it begins to soften at 3000 ℃ under vacuum. When it reaches 3600 ℃, the graphite begins to evaporate and sublimate. The strength of ordinary materials gradually decreases at high temperatures, while the graphite is heated to 2000 ℃.

High thermal conductivity and conductivity

High thermal conductivity and conductivity

The thermal conductivity and conductivity of graphite are quite high. Its conductivity is 4 times higher than that of stainless steel, 2 times higher than that of carbon steel, and 100 times higher than that of ordinary nonmetals.

Lubricity and plasticity

Lubricity and plasticity

Graphite has good lubricity and plasticity. The friction coefficient of graphite is less than 0.1. Graphite can develop into breathable and transparent sheets. The hardness of high-strength graphite is very high, which is difficult to process with diamond tools.

Chemical stability

Chemical stability

Graphite is chemically stable and resistant to acid, alkali and organic solvents. As graphite has the above unique excellent properties, it is increasingly used in modern industry.