Knowledge About High Purity Graphite Powder Properties
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Update time : 2021-08-24 09:46:32
Graphite powder is a kind of mineral powder, the main component is carbon simple substance, soft in quality, and it’s dark gray color. Graphite powder has high temperature resistance and electrical conductivity, and can be used as refractory materials, conductive materials, and wear-resistant lubricating materials.
High Purity Graphite Powder Properties
The chemical properties of graphite powder are relatively stable at room temperature, and are insoluble in water, dilute acids, dilute alkalis and organic solvents. Under heating, graphite powder is easier to be oxidized by acid; at high temperature, it can also react with many metals to form metal carbides, which can smelt metals at high temperatures.
Graphite powder is a chemically sensitive substance. Its resistivity will change in different environments, that is, its resistance value will change, but one thing will not change. Graphite powder is one of the very good non-metallic conductive materials. As long as the graphite powder is uninterrupted in the insulating object, it will be energized like a thin wire.
Due to its special structure, graphite powder 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 if 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 powder increases with the increase of temperature. At 2000°C, the strength of graphite doubles.
2) Electrical and thermal conductivity: The electrical conductivity of graphite is one hundred times higher than that of general non-metallic minerals. The thermal conductivity exceeds that of metal materials such as steel, iron, and lead. Thermal conductivity decreases with increasing temperature, even at extremely high temperatures, graphite becomes an insulator.
3) Lubricity: The lubricating performance of graphite powder depends on the size of the graphite flakes. The larger the flakes, the smaller the friction coefficient and the better the lubricating performance.
4) Chemical stability: Graphite powder has good chemical stability at room temperature, and is resistant to acid, alkali and organic solvent corrosion.
5) Plasticity: Graphite powder has good toughness and can be connected into very thin flakes.
6) Thermal shock resistance: Graphite powder can withstand drastic changes in temperature without being damaged when used at room temperature. When the temperature changes suddenly, the volume of graphite will not change much and no cracks will occur.
Luoyang Trunnano Tech Co., Ltd (TRUNNANO) is a professional elementary powder supplier with over 12 years experience in chemical products research and development. We accept payment via Credit Card, T/T, West Union and Paypal. Trunnano will ship the goods to customers overseas through FedEx, DHL, by air, or by sea.
If you are looking for high quality graphite powder, please feel free to contact us and send an inquiry.
