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Almost all impermeable graphite that be applied in chemical industry are manufactured via impregnation . Impregnant is not only applied to filling hole but also to improving mechanical strength of impregnated graphite. But while different impregnat is used, different mechanical strength appear, such as chemical stability, thermal ability, hardness, etc. So when you are choosing impregnant, it should conform to following characteristics: Good chemical stability Good mechanical ability Steady Volume which can suffer impregnation Low water content Low viscosity Peopley usually choose phenolic resin, modified phenolic resin, furfural acetone resin, furfuryl alcohol resin and coal pitch. However, sometimes, people choose organic silicon resin, sodium silicate, molten sulfur, paraffin as impregnant. Impregnated impermeable graphite is simmilar with other graphite material, which…
The Graphite crucible has good thermal conductivity and high temperature resistance. It has the resistance property to strain for quick heating and cooling and its thermal expansion coefficient is small in the process of high temperature. It has good corrosion resistance to acid and alkaline solution and good chemical stability. the graphite crucible is widely used in the melting of alloy tool steel and non-ferrous metal and its alloy smelting, and has a good technical and economic effects in metallurgy, casting, machinery, chemical and other industrial sectors. At present, there are two kinds of production processes of graphite crucible in China: plastic forming process and cold isostatic pressing forming process. the plastic forming process which as the clay the adhesive…
Graphite felt is widely used as a composite conductive layer, suitable for the use of vacuum assisted resin transfer molding, infiltration resistance change process and the curing process of the system is small, in the design and forming the surface of the conductive layer, fiber layer can predict the electrical conductivity of composites. The electrical conductivity of the composite material can be changed to a specific circuit, and there is a layer sensitive area and a pressure sensitive area. Due to the excellent mechanical properties and good electrical conductivity, graphite felt is widely used as conductive materials, electromagnetic shielding materials, fuel cell electrode materials and so on. It can improve the connection between the resin and the fiber by using…
