Qu'est-ce que la poudre de graphite

(Qu'est-ce que la poudre de graphite)

La poudre de graphite est douce et gris foncé; il a un toucher gras et peut tacher le papier. La dureté est 1-2, et la dureté peut augmenter jusqu'à 3-5 with the increase of impurities in the vertical direction. The specific gravity is 1.9 à 2.3. Under the condition of isolating oxygen, its melting point is above 3000℃, which is one of the most temperature-resistant minerals. The chemical properties of graphite powder are relatively stable at room temperature, and are insoluble in water, dilute acid, dilute alkali and organic solvents; the material has high temperature resistance and conductivity, and can be used as refractory materials, conductive materials, and wear-resistant lubricating materials.

It reacts with oxygen at different high temperatures to produce carbon dioxide or carbon monoxide; among halogens, only fluorine can directly react with elemental carbon; graphite powder is easier to be oxidized by acid under heating; at high temperatures, it can also react with many metals to form metal carbonization It can smelt metals at high temperatures.

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(Qu'est-ce que la poudre de graphite)