Flake graphite is widely used in industry, which stems from its own high-quality characteristics. Today, Furuite Graphite Xiaobian will tell you the reasons for the high-quality characteristics of flake graphite from the aspects of family composition elements and mixed crystals:
First, the high-quality characteristics of carbon elements that make up flake graphite.
1. The chemical properties of elemental carbon are relatively stable at room temperature, and it is insoluble in water, dilute acid, dilute alkali and organic solvents;
2, reacting with oxygen at different high temperatures to generate carbon dioxide or carbon monoxide; In halogen, only fluorine can react directly with elemental carbon;
3. Under heating, elemental carbon is easily oxidized by acid;
4. At high temperature, carbon can also react with many metals to generate metal carbides;
5. Carbon is reducible and can be used to smelt metals at high temperature.
Second, the characteristics of mixed crystals composed of flake graphite.
1. In graphite crystal, carbon atoms in the same layer hybridize with sp2 to form covalent bonds, and each carbon atom is connected with three other atoms by three covalent bonds. Six carbon atoms form a hexagonal ring on the same plane, stretching into a layered structure, where the bond length of C-C bond is all 142pm, which belongs to the bond length range of atomic crystal, so for the same layer, it is an atomic crystal.
2. The layers of graphite crystals are separated by 340pm, which is a large distance, and are combined by van der Waals force, that is, the layers belong to molecular crystals. However, due to the strong bond between carbon atoms in the same plane layer, it is extremely difficult to destroy, so the melting point of graphite is also high and its chemical properties are stable.
Post time: Apr-20-2023