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 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. Graphite powder-soft, black gray; Greasy, can pollute the paper. The hardness is 1 ~ 2, along the vertical direction with the increase of impurities the hardness can be increased to 3 ~ 5. The specific gravity is 1.9 ~ 2.3. Under the condition of oxygen isolation, its melting point is above 3000℃, and it is one of the most temperature-resistant minerals.
The semiconductor industry is a new branch of science and technology, which has attracted great attention in recent years, and graphite powder has become an indispensable material for the development of the semiconductor industry. Because of the conductive properties of graphite used in semiconductors.The higher the carbon content of graphite powder, the better the electrical conductivity, generally need to consider the indicators: particle size, heat resistance, purity.
Grain size corresponds to different mesh numbers, while specifications are expressed in mesh numbers. The larger the sieve number of conductive graphite powder, the smaller the particle size, the better the lubrication performance, which can be used in the field of lubrication material production.
The particle size used in the semiconductor industry should be very fine because it is easier to achieve processing precision, high-temperature compressive strength, the loss is relatively small, especially for the sintering mold, requiring high processing accuracy.
Particle size distribution, such as 20 mesh, 40 mesh, 80 mesh, 100 mesh, 200 mesh, 320 mesh, 500 mesh, 800 mesh, 1200 mesh, 2000 mesh, 3000 mesh, 5000 mesh, 8000 mesh, 12500 mesh, the smallest can be 15,000 mesh.
Many products in the application of the conductor industry need to be constantly heated. To prolong the service life of the device, it requires conductive graphite powder to have the following properties: excellent reliability and high-temperature impact resistance.
The requirements of the semiconductor industry production of graphite powder are: the higher the purity, the better, especially between the two touches the graphite device, if there are too many impurities, will pollute the semiconductor material. Therefore, we need to strictly control the purity of conductive graphite powder, but also need to put them through a high-temperature graphitization process, to minimize the gray level.
