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The graphite is made of natural flake graphite,after oxide intercalation, the thermal expansion, compression molding. Graphite sheet is one kind of flexible graphite,and it’s invented in 1963. after that,it’s widely used in The United Kingdom,German,Franch and Japan. The natural flake graphite is rich in China,and it’s our advantage to do the research and development on the graphite sheet. The production method of graphite sheet: Graphite is belong to the hexagonal crystal system,and it has a laminated structure,the Interlayer bonding force is very weak,so we could insert some Molecules and atoms into the interlamination by oxidation,and intermetallic compounds is formed, meanwhile expanding the spacing of layers at this step.then heat to about 1000℃ instantly after water scrubbing the compounds,the compounds between…
The crucible made of graphite material is called graphite crucible.It has a long history to use the graphite crucible.At first the graphite crucible consists of natural graphite (flake graphite and amorphous graphite) and clay,sand,using the pottery manufacturing process to produce.it used to melt metal(copper,iron,steel etc.) The graphite has a high mechanical strength, refractoriness, Thermal conductivity,could withstand repeated smelting and Erosion of high temperature solution.with the development of modern industry, the development of metal casting in electric furnace makes the natural graphite limited. Since the advent of artificial graphite by the end of nineteenth Century,the artificial graphite crucibles are widely used. High purity fine structure graphite,high strength graphite,glassy carbon material broaden the application range of graphite crucible.the graphite crucibles start to…
Graphite electrode is usually used as extruded graphite materials, because of low resistivity of extruded graphite, conductive performance is good, the price is competitive Mold geometry increasing complexity and diversification of product applications has led to the discharge of sparks getting high accuracy requirements. Graphite electrodes are the advantages of easier machining, electrical discharge machining removal rate is high, small graphite loss, therefore, part of the group of sparks machine customers gave up and switched to the copper electrode graphite electrodes. In addition, some special shape of the electrodes can not be made of copper, but are more easily molded graphite and copper electrodes heavy, not suitable for processing large electrode, these factors have caused some group of sparks machine…
