Graphite powder is a type of mineral, and its main constituent is carbon simple substance. It’s soft, dark gray in color, with a soft texture. Graphite is a powder with high electrical conductivity. It’s also resistant to heat and can be used in refractory and conductive materials.
High Purity and Graphite powder Properties
The graphite is a powder that can be oxidized more easily by acids when heated. It is easier for graphite to be oxidized when heated.
Graphite Powder is a chemically reactive substance. Its resistance will change with different environments. Graphite Powder is one of very good non-metallic conductive substances. As long as graphite is not interrupted in the insulating material, it will act like a thin metal wire.
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.
The thermal conductivity is higher than the electrical 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 lubrication performance.
4) Chemical stability Graphite is chemically stable at room temperatures and resistant to acids, alkalis, and organic solvent corrosion.
Graphite is a tough powder that can be shaped into thin flakes.
6) Thermal shock resistance – Graphite Powder can withstand sudden temperature changes and not be damaged if used at ambient temperature. When temperature suddenly changes, graphite’s volume does not change and there are no cracks.
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