Graphite Physical And Chemical Properties

Graphite is soft, dark gray, greasy, and can contaminate paper. The hardness is 1～2, and the hardness can increase to 3～5 with the increase of impurities in the vertical direction. The specific gravity is 1.9～2.3. The specific surface area is concentrated in the range of 1-20m2/g. Under the condition of oxygen isolation, its melting point is above 3000℃, which is one of the most temperature-resistant minerals. It can conduct electricity and heat.

There is no pure graphite in nature, which often contains impurities such as SiO2, Al2O3, FeO, CaO, P2O5, and CuO. These impurities often appear in the form of minerals such as quartz, pyrite, and carbonate. In addition, there are gas parts such as water, asphalt, CO2, H2, CH4, and N2. Therefore, in the analysis of graphite, in addition to determining the fixed carbon content, the volatile and ash content must also be determined at the same time.

Graphite and diamond, carbon 60, carbon nanotubes, graphene, etc. are all simple substances of carbon, and they are allotropes.