Graphite Powder
Size
1≥60%, etc
Package
25kg small bags into ton bags or ton bags
Features
High temperature resistance, conductivity and thermal conductivity, etc.
Application
As refractory material, conductive material and wear-resistant lubricating material, etc.
Graphite powder is a widely used industrial material, which is obtained from high-purity graphite after crushing, grinding, and screening. The classification of graphite powder is mainly based on the particle size, ranging from 50 mesh to 30000 mesh. The larger the mesh, the finer the particle size, and the higher the price.
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Graphite powder is soft, black gray; It is greasy and can pollute the paper. The hardness is 1 ~ 2, and the hardness can increase to 3 ~ 5 with the increase of impurities in the vertical direction. The specific gravity is 1.9 ~ 2.3. Under the condition of isolating oxygen, its melting point is above 3000 ℃, which is one of the minerals with high-temperature resistance. At room temperature, the chemical properties of graphite powder are relatively stable and insoluble in water, dilute acid, dilute alkali, and organic solvents; The material has high-temperature resistance and conductivity and can be used as a refractory, conductive material, and wear-resistant lubricating material.
Graphite powder is a chemical reaction is very sensitive material, in a different environment resistivity he will change, also is his resistance to change, but one thing is not changed, the graphite powder is one of the very good non-metallic conductive material, as long as the object of the insulation inside guarantee graphite powder uninterrupted, like a thin line, also will be powered, but, how much is the resistance value, This value is not an accurate number, because the thickness of graphite powder is not the same, with different materials and environment graphite powder resistance value will be different. Due to its special structure, graphite has the following special properties:
1) High-temperature resistance: the melting point of graphite is 3850±50℃, the boiling point is 4250℃, even after the ultra-high temperature arc burning, the loss of weight is very small, the coefficient of thermal expansion is very small. The strength of graphite increases with the increase of temperature. At 2000℃, the strength of graphite increases twice.
2) Chemical stability: graphite has good chemical stability at room temperature, acid resistance, alkali resistance, and corrosion resistance of organic solvents.
3) Plasticity: graphite has good toughness and can be connected into very thin sheets.
4) Thermal shock resistance: graphite can withstand drastic changes in temperature without damage when used at room temperature. When the temperature changes suddenly, the volume of graphite does not change much and will not produce cracks.
Graphite powder also has many uses：
1, For refractory materials: Graphite and its products have the properties of high-temperature resistance and high strength. In the metallurgical industry, graphite is mainly used to manufacture graphite crucibles. In steelmaking, graphite is commonly used as the protective agent of steel ingot and the lining of metallurgical furnaces.
2, For conductive material: In the electrical industry, it is used to manufacture electrodes, brush, carbon rod, carbon tube, the positive electrode of mercury positioner, graphite gasket, telephone parts, coating of the TELEVISION picture tube, and so on.
3, For wear-resistant lubrication materials: graphite is often used as a lubricant in the machinery industry. Lubricating oil often can not be used under the conditions of high speed, high temperature, and high pressure, and graphite wear-resistant materials can be in (a)200~2000℃ temperature in the very high sliding speed, without lubricating oil work. Piston cups, sealing rings, and bearings made of graphite are widely used in many types of equipment for conveying corrosive media. They do not need lubricating oil when running. Graphite is also a good lubricant for many metal processing (wire drawing, tube drawing).
