2022-11-19
2023-08-021. Chemical intercalation method: the initial raw material for preparation is high carbon flake graphite, and other chemical reagents such as concentrated sulfuric acid (more than 98%), hydrogen peroxide (more than 28%), Potassium permanganate, etc. use industrial grade reagents. The general steps for preparation are as follows: under appropriate temperature, hydrogen peroxide solution with different ratios, natural flake graphite and concentrated sulfuric acid are added in different procedures, and reacted for a certain time under constant agitation, and then washed with water to neutral, Centrifuge separation, dehydrate and vacuum dry at 60 ℃.2. Electrochemical method: Treating graphite powder in a strong acid electrolyte to produce expandable graphite, hydrolyzing, cleaning, and drying. As a strong acid, sulfuric acid or nitric acid is mainly used. This method produces expandable graphite with low sulfur content.3. Ultrasonic oxidation method: In the process of preparing expandable
2023-08-01Graphite crystal has a hexagonal network plane layered structure composed of carbon elements. The carbon atoms on the layer plane are bound by strong Covalent bond, while the layers are bound by Van der Waals force force. The binding is very weak, and the distance between layers is large. Therefore, under appropriate conditions, acid, alkali gold, salt and other chemicals can be inserted into the graphite layers, And combine with carbon atoms to form a new chemical phase - Graphite intercalation compound (GIC). When heated to an appropriate temperature, this interlayer compound can instantly and rapidly decompose, producing a large amount of gas, which makes graphite expand along the axis into a new worm like material, namely expanded graphite. This unexpanded Graphite intercalation compound is expandable graphite.Expandable graphite was first discovered by Schaufautl, a German. In 1841, Schaufautl soaked natural graphite in a mixture of concentrated HNO3 and concentrated H2SO4, and t
2023-08-01High purity graphite means that the carbon content of graphite is more than 99.99%. High purity graphite has the advantages of high strength, high density, high purity, good seismic resistance, high temperature resistance, oxidation resistance, small resistance coefficient, corrosion resistance, easy precision machining, etc. It is an ideal inorganic non-metallic material, which is used for processing and manufacturing electric heating elements, Electrical discharge machining graphite, sintering mold, electronic tube anode, etc, Widely used in advanced refractory materials and coatings in the metallurgical industry, stabilizers for military pyrotechnic materials, pencil leads in light industry, carbon brushes in electrical industry, electrodes in battery industry, and catalyst additives in fertilizer industry, high-purity graphite can be further processed to produce high-tech products such as graphite emulsion, graphite sealing materials and composites, graphite products, and graphite
2023-08-01Spherical graphite is a graphite product that is made from high-quality, high carbon natural flake graphite and uses advanced processing techniques to modify the surface of the graphite. It produces graphite products with different fineness, resembling elliptical spheroids.Spherical graphite material has good conductivity, high crystallinity, low cost, high theoretical lithium intercalation capacity, low and flat charge discharge potential. It is an important part of the negative electrode material for lithium-ion batteries and a replacement product for negative electrode materials used in foreign lithium-ion battery production. It has excellent conductivity and chemical stability, high charging capacity, long cycle life, and is green and environmentally friendly.The process of processing spherical graphite first involves roughly crushing, dressing, magnetic separation, and other processes in the spherical graphite workshop to form the initial product spherical graphite. Then, it ente
2023-07-31Expansion 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 twi
2023-07-31Graphene is a flat film composed of carbon atoms. It has only one carbon atom and is almost completely transparent. The graphene composite material has the characteristics of high strength, good toughness, excellent conducting thermal and thermal performance. Environmental purification and other fields have broad application prospects.Due to its large reserves, high strength, and good processability, aluminum alloy has been widely used in modern industries, military aerospace and civilian fields. loss. Therefore, it is important to do the anti -corrosion work of aluminum alloy materials.In this project, the composite of gallery oxide participating in self -made water -soluble nano -coating materials and rare earth passivation has a significant promotion effect on aluminum alloy anticorrosion. Among them, graphene alleviates environmental pollution caused by organic emissions, improves the coatings itself. Anti -environmental aging ability, rare earth replace toxic hexavalent chromium,
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