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High pure graphite generally refers to the amount of carbon in the 99.99% above the stone ink, in the organization structure can be divided into three kinds of coarse grain structure, fine particle structure and ultrafine particles structure, high pure graphite is used in a large number of single crystal silicon furnace. The base material for integrated circuit is mainly silicon single crystal chip, the silicon single crystal growth process is mainly uses the Czochralski (CZ), and other methods of magnetic Czochralski method (MCZ), regional (Fz) method and double crucible pulling method, Czochralski silicon accounted for about 80% of the total amount of silicon single crystal for the global electronics industry, Czochralski silicon furnace graphite piece is a consumable by…
The foundry industry in the machinery industry uses graphite material as the pressure casting, centrifugal casting, super hard alloy hot extrusion and other processing of the mold, big to the train wheel, small to precision parts can be used graphite mold. Graphite mold can be used repeatedly, after the release of the casting has a high degree of finish, some without further processing can be used. Graphite materials used in the casting mold should be of high quality, low thermal expansion coefficient and good oxidation resistance. Graphite can be used in the casting of large size. China for the manufacture of a large number of graphite mold, in 2005, the continuous casting of graphite about 1500t, the use of graphite…
The graphite material plate has a good electrical conductivity,thermal conductivity,and corrosion resistance,so it’s widely used as the bipolar plate of full cell. However,there are some small hole,during the production process,and the size of the holes are different. The main reason is that some coal tar which is used as binder will be oxidation or volatilization during the making process. And this situation will have a bad influence on the graphite plate The porosity of graphite plate is about 18.2%~24.4%. Now,the most common method is using some organic compound to fill in the hole of graphite plate,such as phenolic resin, paraffin, asphalt, polymer, etc. to achieve the purpose of sealing,but it can increase the resistance of graphite plate. The new way…
