2022-11-23
2023-08-03The quality of flake graphite determines the product quality of processed flake graphite powder. The flake graphite resource is crystalline natural graphite, which is formed by the metamorphism of carbonaceous rocks under long-term geological processes. The crystallization of flake graphite is in the form of flakes. The size of the flake crystal and the fixed carbon content of flake graphite are key factors that affect the quality of flake graphite. Below, we will take you to understand:As a basic processing material for various graphite powder products, the quality of flake graphite is a very important condition. Based on the quality and various parameters of flake graphite, it can be processed into flake graphite powder, ultrafine graphite powder, high-purity graphite, nano graphite, colloidal graphite and other graphite powder products. The size of flake graphite determines the lubrication performance of the processed graphite powder. The larger the size of flake graphite, the bett
2023-08-02Flake graphite is a type of natural graphite that, after being extracted and purified, generally appears in the form of fish scales, hence it is called flake graphite. Expandable graphite refers to flake graphite that, after acid washing and intercalation treatment, expands by about 300 times compared to the previous graphite. It can be used as raw materials for coils and flexible graphite. Below, let me introduce in detail the differences between flake graphite and expandable graphite:1. The use of flake graphite is more extensive than that of expandable graphiteIn industrial production, flake graphite not only has the function of expandable graphite, but also has much better conductivity, thermal conductivity, smoothness, and so on than expandable graphite. So its practical use in industry is becoming increasingly widespread.2. The production processes of flake graphite and expandable graphite are differentFlake graphite is mainly made by mechanical damage and grinding. Expandable g
2023-08-021. Sealing material: the raw material high carbon graphite is mixed with concentrated sulfuric acid and nitric acid for acidification treatment, heat treatment and then pressed into shape. The prepared flexible graphite is a new high-performance sealing material and a nano material grown in situ. Compared with traditional sealing materials such as asbestos rubber, it has good Compressibility, resilience, self-adhesion, low density and other excellent properties, and can be used at high temperature It has been used for a long time under harsh working conditions such as high corrosion. Graphite plates and sealing elements made of it are widely used in aerospace, machinery, electronics, nuclear energy, petrochemical, electric power, shipbuilding, smelting and other industries. Because of its excellent characteristics such as light weight, conductivity, heat conduction, high temperature resistance, acid and alkali corrosion resistance, good resilience, lubrication, plasticity and chemical
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
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