What is graphite? Graphite chemical formula & graphite periodic table
By:Win Sep 09, 2021
Graphite is a nonmetallic material, is the allotrope of carbon, chemical formula is C; With high temperature resistance, high strength conductive material; Suitable for making refractory materials, graphite electrodes, firebricks and graphite products.
What is graphite?
Graphite is gray black, opaque solid, stable chemical properties, corrosion resistance, acid, alkali and other agents are not easy to react. Combustion in oxygen to generate carbon dioxide, can be concentrated nitric acid, potassium permanganate and other strong oxidant oxidation.
The carbon atoms of graphite have a hexagonal layered structure, which does not form a "spatial network". Graphite is a layer structure. If you look at it in a single layer, the C-C bond forms a regular hexagonal extended shape, while if you look at it as a whole, it is a layer by layer structure. So the monolayer is extremely hard, and the interlayer is extremely soft. Each layer consists of innumerable small hexagonal cells. But there are no strong bonds between the adjacent layers, so graphite can be used as a lubricant.
Graphical molecular structure diagram
Graphite chemical formula
The chemical formula of graphite is C, Molecular weight: 12.01. Nanotubes, diamond and graphite are allotropes of carbon, and the chemical formula can be expressed by "C".
Properties of graphite:
1) high temperature resistance: melting point of graphite is 3850±50℃, boiling point is 4250℃, ultra-high temperature arc burning, small weight loss, small thermal expansion coefficient. The strength of graphite increases with the increase of temperature. At 2000℃, the strength of graphite increases twice.
2) Electric and thermal conductivity: the electrical conductivity of graphite is one hundred times higher than that of general non-metallic ore. Thermal conductivity exceeds steel, iron, lead and other metal materials. Thermal conductivity decreases with increasing temperature, and even at extremely high temperatures, graphite becomes an insulating body.
3) lubrication: the lubrication performance of graphite depends on the size of graphite scale, the larger the scale, the smaller the friction coefficient, the better the lubrication performance.
4) chemical stability: graphite has good chemical stability at room temperature, acid resistance, alkali resistance and corrosion resistance of organic solvents.
5) Plasticity: graphite has good toughness and can grow into very thin sheets.
6) Thermal shock resistance: graphite can withstand drastic changes in temperature without damage when used at room temperature. When the temperature changes suddenly, the volume of graphite does not change much and will not produce cracks.
Graphite periodic table