Knowledge About High Purity Graphite Powder Properties


Jul 17, 2023

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Graphite powder The main component of this mineral powder is carbon, which is soft and dark gray in color. 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-powder chemical properties are stable at room temperatures. They are not soluble in water, diluted acids, diluted alkalis, or organic solvents. Under heating graphite powder can be more easily oxidized with acid. It can also react at high temperatures with metals to produce metal carbides which can smelt the metals.

Graphite Powder is a chemically sensitive substance. Its resistance will change with different environments. Graphite Powder is a very good non-metallic conductive substance. The graphite will energize the object as long as it is not interrupted.

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 and thermal expansion coefficient will be very small even if graphite is burnt by an ultra-high temperature arc. With increasing temperature, the strength of powdered graphite increases. At 2000degC the strength of graphite powder doubles.

Graphite has a high electrical and thermal conductivity. 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 larger the graphite flakes are, the lower the friction coefficient is and the greater the lubricating properties.

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 combined into thin flakes.

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

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