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Pyrolytic graphite is a new type of carbon material, it is the high crystallinity pyrolytic carbon under the high pure hydrocarbon gas in the furnace pressure and one the graphite matrix which is in 1800 DEG C to 2000 C through the chemical vapor deposited, it has a high density (2.20g/cm), high purity (impurity content is 0.0002%) and the heat, electricity ,magnetism and mechanical properties anisotropy . The vacuum degree of 10mmHg can still be maintained at about 1800 DEG C. Pyrolysis is the process of decomposition of a substance by heat. The decomposition reactions will occur when many inorganic substances and organic matter are heated to a certain degree .The pyrolysis process does not involve the reaction of the…
Polyacrylonitrile (PAN) based graphite felt , made of PAN precursor in an inert gas in high temperature and antipyretic have a variety of forms, such as continuous products, carbon fiber, short carbon fiber and short carbon fiber. It has many applications in engineering because of its excellent physical and chemical properties and electrical conductivity. Continuous carbon fibers are often used in resin matrix composites as reinforcements. The most widely used short cut carbon fiber is a small amount of chopped carbon fiber mixed with concrete, forming carbon fiber concrete, which has a variety of functional characteristics such as pressure sensitivity, temperature sensitivity, thermoelectric and electrothermal effects. Based on the above features, carbon fiber reinforced concrete materials can be used in…
Ammonia decomposition produced by urea nitrogen doping on graphite felt, preparation of nitrogen doped graphite felt, compared with nitrogen doped graphite felt and graphite felt has more excellent electrochemical performance, and doping temperature and doping time have influence on the electrochemical activity of graphite felt. Proton exchange membrane fuel cell (PEMFC) has many advantages, such as high power density, low working temperature, fast start and long service life, but hydrogen storage is used as fuel. Graphite felt is the main cathode material of direct flow methanol fuel cell, and its performance is very important for direct flow methanol fuel cell. Graphite felt has the advantages of good stability, large surface area under unit cost, good fluid permeability, etc. but its…
