Time：2023.12.26Browse：1
Graphite is a transitional crystal between atomic crystals, metal crystals, and molecular crystals. In the crystal, covalent bonds are formed by sp2 hybridization between carbon atoms on the same layer. Each carbon atom is connected to three other carbon atoms, and six carbon atoms form a regular hexagonal ring on the same plane, extending to form a layered structure. Carbon atoms in the same plane each have one p orbital left, which overlaps with each other to form delocalized π - bonds. Electrons can freely move in the lattice and be excited, so graphite has a metallic luster and can conduct electricity and heat transfer. Due to the large distance between layers and the low bonding force (van der Waals force), each layer can slide, resulting in a lower density of graphite compared to diamond, a softer texture, and a smoother texture. [1]
The distance between each layer of graphite is 3.40 Å, which is combined by van der Waals forces. The layers belong to molecular crystals, and the distance between carbon atoms in the same layer is 1.42 Å. Due to the strong bonding between carbon atoms in the same plane layer, it is extremely difficult to break, so the melting point of graphite is also high and its chemical properties are stable. Due to its unique bonding method, it cannot be solely considered as a single crystal or polycrystalline material. It is now widely believed that graphite is a mixed crystal.
Graphite belongs to the hexagonal crystal system and has complete layered cleavage. The cleavage surface is mainly composed of molecular bonds and has weak attraction to molecules, so its natural floatability is very good.
2023-02-10Fluorine graphite is a new type of graphite product that integrates performance and benefits. With high added value and unique quality, graphite functional materials are widely used in multiple fields. It is mainly used in the fields of battery raw materials and solid lubricants.
We all know that graphite has excellent chemical stability. After special processing, graphite also has the characteristics of corrosion resistance, good thermal conductivity, and low permeability. Therefore, it is widely used as heat exchangers, reaction tanks, condensers, combustion towers, absorption towers, coolers, heaters, filters, and pump equipment.
Expansion graphite exposure will expand rapidly at high temperatures. It has a certain isolation effect and can be used to extinguish metal fires such as lithium, sodium, potassium, uranium, and cricket. It is a good fire extinguishing agent. In actual use, we found that the functional effect of expansion graphite has a lot to do with the number of expansion of expansion graphite. The following graphite manufacturer editor will explain the function of repeated expansion of expanded graphite:The number of expansion graphite determines the role of expanding graphite. The repeated expansion of graphite powder is fluffy powder, which presents a structure similar to a kneading paper ball on the micro structure, but the active point of the carbon layer edges will increase. When making expansion graphite fire extinguishers, the expansion graphite can be expanded repeatedly. When the expansion graphite expands more than three times, the expansion of the expansion graphite is now less than twi2023-12-11The Future Market Prospects of Graphite Powder
2023-07-31Will the performance changes after expanding graphite multiple times?
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