The difference between artificial graphite and natural graphite: crystal structure. Natural graphite: Crystal development is more perfect, the graphite scale of flake graphite is more than 98%, and the graphitization degree of natural microcrystalline graphite is usually below 93%. Synthetic graphite: The degree of crystal development depends on the raw material and heat treatment temperature. In general, the higher the heat treatment temperature, the higher the degree of graphitization. At present, the degree of graphitization of synthetic graphite produced by industry is usually less than 90%. Organization structure: Natural Flake Graphite: It is a single crystal, the structure is simpler, there are only defects in crystallography (such as point defect, dislocation, layer error, etc.), and the characteristics of anisotropy are shown macroscopically. The grains of natural microcrystalline graphite are small, the grains are disordered and the pores are removed after impurity removal, which shows the isotropy in macroscopic.Graphite Rounds
Synthetic graphite: It can be regarded as a multiphase material, including the graphite phase transformed by carbonaceous particles such as petroleum coke or tar Coke, the graphite phase of the coal tar binder which is coated around the granule, the grain accumulation or the porosity of the coal tar binder after heat treatment.
Physical form: Natural graphite: Usually in powder form, can be used alone, but usually with other materials after the use. Artificial graphite: More forms, both powdery and fibrous and blocky, while the narrow sense of man-made graphite is usually blocky, it needs to be processed into a certain shape. Physical and chemical properties of physical and chemical properties, natural graphite and man-made graphite have common, there are differences in performance. such as natural graphite and man-made graphite are good conductors of heat and electricity, but for the same purity and granularity of graphite powders, natural flake graphite heat transfer performance and conductivity of the best, natural micro-spar Ink second, the lowest man-made graphite. Graphite has good lubricity and a certain plasticity, natural flake graphite crystal development is perfect, the coefficient of friction is small, the best lubricity, the highest plasticity, and dense crystalline graphite and hidden crystalline graphite second, the man-made graphite is poor.Graphite Rounds
Application field: In metallurgical industry, natural flake graphite can be used to produce magnesia-carbon bricks and alumina-carbon bricks because of its good oxidation resistance. Artificial graphite can be used as a steelmaking electrode, and the electrodes made from natural graphite are difficult to use in the more demanding steelmaking furnaces. In the mechanical industry, graphite materials are usually used as wear and lubrication materials. Natural Flake Graphite has good lubricity and is commonly used as additive of lubricating oil. The equipment for conveying corrosive media is widely used in piston rings, seals and bearings made of man-made graphite, without adding lubricating oil at work. Natural graphite and polymer resin composites can also be used in these fields, but wear resistance is inferior to synthetic graphite.Graphite Rounds
In the chemical industry, synthetic graphite has the characteristics of corrosion resistance, good thermal conductivity and low permeability. In the chemical industry is widely used in the production of heat exchangers, reaction tanks, absorber towers, filters and other equipment. Natural graphite and polymer resin composite can also be used in the field, but the thermal conductivity, corrosion resistance is inferior to synthetic graphite.Graphite Rounds