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Graphite powder soft, black gray; greasy feeling, can pollute the paper. Hardness of 1 ~ 2, along the vertical direction with the increase of impurities in its hardness can be increased to 5 ~ 3. Proportion of 1.9 to 2.3. Under the condition of isolated oxygen, its melting point is above 3000 degrees Celsius, it is one of the most temperature resistant minerals. At room temperature the chemical properties of graphite is relatively stable, insoluble in water, dilute acid, dilute alkali and organic solvent; material has high temperature resistant conductive performance, do refractory materials, conductive materials, wear-resistant lubricating material. Material profile Graphite powder soft, black gray; greasy feeling, can pollute the paper. Hardness of 1 ~ 2, along the vertical…
Many kinds of materials have been developed and used in graphite crucibles after many years of high speed development, and the graphite crucibles made of different materials has different characteristics in its application. Graphite crucible materials can be roughly divided into artificial graphite, graphite - clay material and graphite - silicon carbide material. Artificial graphite crucible is made from graphite electrode material. The main component of graphite-clay crucible are natural flake graphite and clay. Now it’s only used in high temperature melting of iron casting and steel casting and the melting of precious metals. Graphite - silicon carbide crucible is made from the natural flake graphite and silicon carbide .Most of the melting of non-ferrous metals such as copper alloy…
carbon/carbon composite material integrated carbon material of high temperature properties and composite materials with excellent mechanical properties, with high specific strength and high specific stiffness, excellent ablation resistance and friction performance, good thermal shock resistance, low creep, high temperature strength retention rate high and good biocompatibility and so on a series of excellent properties, it can be as functional materials, and can be used as high temperature structural materials, is currently the only composite material for high temperature of 2800. So far, the carbon carbon composites have been successfully application in missile reentry nose cone, solid rocket motor nozzle, aerospace aircraft structure parts, brake disc, a heat exchanger, high power electronic device radiator and artificial bones, joints, teeth many fields,…
