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Characteristics of graphite powder
Keywords: anti-corrosion carbon bricks
Release time:
2026-05-21 10:02
Source:
Graphite powder is a substance that is highly sensitive to chemical reactions. Its resistivity will change in different environments, which means its resistance value will change. However, one thing remains unchanged: graphite powder is one of the excellent non-metallic conductive substances. As long as the graphite powder is kept uninterrupted in an insulating object, it can also be electrified like a thin wire. However, there is no exact value for the resistance value, because the thickness of graphite powder is different, and the resistance value of graphite powder will also vary in different materials and environments. Due to its unique structure, graphite has the following special properties:
1) High temperature resistant type: The melting point of graphite is 3850 ± 50 ℃, and the boiling point is 4250 ℃. Even after being burned by ultra-high temperature arc, the weight loss is very small, and the thermal expansion coefficient is also very small. The strength of graphite increases with temperature, and at 2000 ℃, the strength of graphite doubles.
2) Conductivity and thermal conductivity: The conductivity of graphite is one hundred times higher than that of typical non-metallic minerals. Thermal conductivity exceeds that of metal materials such as steel, iron, and lead. The thermal conductivity decreases with increasing temperature, and even at extremely high temperatures, graphite becomes an insulator.
3) Lubrication: The lubrication performance of graphite depends on the size of graphite flakes. The larger the flakes, the lower the friction coefficient, and the better the lubrication performance.
4) Chemical stability: Graphite has good chemical stability at room temperature, and can resist acid, alkali, and organic solvent corrosion.
5) Plasticity: Graphite has good toughness and can be connected into very thin sheets.
6) Thermal shock resistance: Graphite can withstand drastic temperature changes without damage when used at room temperature. When the temperature suddenly changes, the volume of graphite does not change significantly and will not crack.
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