Why can graphite powder conduct electricity?
Pure graphite in nature is not there, which often contains Si02, A1203, Fe0, CaO, P2O5, Cu0 and other impurities. These impurities often appear in quartz, pyrite, carbonate and other minerals. In addition, there are water, asphalt, CO2, H2, CH4, N2 and other parts of the gas. Therefore, the determination of graphite, in addition to the determination of fixed carbon content, but also the simultaneous determination of volatile and ash content.
Graphite and diamond, carbon 60, carbon nanotubes are carbon elements, they are allotropes.Laixi, Shandong Province, is one of the important graphite producing areas in China. The proved graphite reserves are 6 million 871 thousand and 100 tons, and the reserves are 6 million 399 thousand and 300 tonsSoft, black, gray, greasy, dirty paper. Hardness is 1~2, along the vertical direction with the increase of impurities, its hardness can be increased to 3~5. The specific gravity is 1.9 ~ 2.3. Under isolated oxygen conditions, the melting point is above 3000 degrees Celsius and is one of the most refractory minerals.
Graphite is a crystalline mineral of carbonaceous elements. Its crystalline framework is hexagonal layered structure. The distance between each network layer is 3.40, and the distance between the carbon atoms in the same network layer is 1.42A. Of the six Fang system with a complete lamellar cleavage. The cleavage surface is mainly based on molecular bonds, and has weaker molecular attraction, so its natural floatability is very good.
Dense crystalline graphite is also called massive graphite. These crystals are crystalline and visible to the naked eye. Particle diameter greater than 0.1 mm. The crystals are arranged in a dense and blocky structure. The graphite is characterized by a very high grade, general carbon content is 60 ~ 65%, sometimes up to 80 ~ 98%, but its plasticity and unctuousness as fine flake graphite.
