Knowledge About High Purity Graphite Powder Properties

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Graphite powder It’s a type of mineral powder. The main component is carbon-based substance. It has a soft quality and dark gray colour. Graphite is a powder with high temperature resistance, electrical conductivity. It’s used in refractory material, conductive material, and wear resistant lubricating materials.

High Purity and Graphite powder Properties

The graphite is oxidized more easily by acids when heated. Under heating graphite powder can be more easily oxidized with acid. It can also react at high temperature with metals to produce metal carbides which can smelt the metals.

Graphite Powder is a chemically reactive substance. Its resistance will change with different environments. Graphite Powder is a very good non-metallic conductive substance. As long the graphite is not interrupted in the insulating material, it will be powered like a thin cable.

The special properties of graphite are due to the special structure of its powder:

1) Type high temperature resistant: The melting and boiling points of graphite are 3850+-50°C, respectively. Weight loss is minimal even when burned with an ultra-high temperature arc. Thermal expansion coefficients are also small. With increasing temperature, the strength of powdered graphite increases. At 2000degC the strength of graphite powder doubles.

2) Electrical conductivity and thermal conductivity. The electrical conductivity in graphite is 100 times higher than the conductivity of non-metallic mineral materials. The thermal conductivity of graphite is greater than metals like steel, iron and lead. The thermal conductivity drops with temperature. Even at very high temperatures, graphite is an insulator.

3) Lubricity: The lubricating properties of graphite powder depend on the size graphite flakes. The smaller the frictional coefficient, the better lubrication performance.

4) Chemical stability Graphite is chemically stable at room temperatures and resistant to acids, alkalis, and organic solvent corrosion.

5) Plasticity Graphite is a tough powder that can be shaped in thin flakes.

6) Thermal Shock Resistance: Graphite Powder can withstand dramatic changes in temperature when used at normal room temperature. When temperature suddenly changes, graphite’s volume does not change and there are no cracks.

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