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The flexible graphite sheet is widely used as an engineering material because of its excellent sealing effect.the main advantage and disadvantage described below: The advantage: 1)high thermal conductivity The high thermal conductivity of flexible graphite sheet is much higher than PTFE and asbestos, During the motive seal,the excellent thermal conductivity could sweep away the heat caused by friction.and avoid the temperature too high. 2)self-lubrication The flexible graphite sheet is made of flake graphite,as the layered structure,it has a good property of self-lubrication.during the work time, the lamellar orientation parallel to the direction of friction,and combining power between layers is very low,and the crystal is easy to move,so the friction coefficient is very low. During the operation of the equipment,it could…
Carbon brushes are a type of graphite parts.Carbon brushes with a resin binder were prepared according to an industrial process and the effects of the molding pressure, grains size and cure temperature on the properties of brush samples were discussed. Four kinds of high-resistivity carbon brushes with MoS2 contents of 0%,2%,4%and 6%(mass fraction)were prepared, respectively.Wear tests of brushes were conducted on an alternate current(AC)motor.Scanning electron microscopy(SEM)and energy dispersive X-ray analysis(EDS)were used to analyze the worn surface of brushes,and a thermocouple was used to measure the bulk temperature of the brush.The results show that wear rate of brush made without MoS2 in 10%relative humidity(RH)is two times larger than that in 50%RH,whereas the wear rates change little for the brushes made with…
Graphite crucible is usually used in smelting metals, especially precious metals . Graphite crucible is made from high quality graphite, have good thermal conductivity and high temperature resistance, high temperature environment used in the thermal expansion is not only the number is small, but also has thermal shock resistance strain performance, acid and alkali resistant with excellent chemical stability. Multiple variety and complete specifications, used in chemical industry, casting and other industrial sectors, the steel smelting and smelting non-ferrous metal and alloy also has been the most widely used. Graphite crucible due to a high temperature thermal expansion coefficient, and thermal shock has some anti-strain properties, and pH of the solution for anti-corrosive, and has excellent chemical resistance to corrosion…
