Application of Isostatic Graphite
Isostatic graphite is a new type of graphite material developed in the 1960s, which has the advantages of large molding specifications, uniform billet structure, high density, high strength, isotropic (characteristics independent of size, shape, sampling direction), etc. Therefore, isostatic graphite is also called "isotropic" graphite. Because of a series of excellent characteristics, it is closely associated with today's high-tech, cutting-edge defense technology, and is an irreplaceable material for manufacturing single crystal silicon furnace, metal continuous casting graphite crystallizer and EDM graphite electrode, etc. It is also an excellent material for manufacturing rocket ignition pole, excitation pole, nozzle and rudder plate, and graphite nuclear reactor deceleration material and reflection material, and cannot be replaced by other lower-quality Graphite products cannot be replaced by other lower quality graphite products.
Isostatic pressure is the state of equal pressure applied to the sealed material in all directions at the same time; isostatic molding is to place the material to be pressed in a high-pressure container after sealing, using the incompressible nature of the liquid medium and the nature of uniform transfer of pressure from all directions to uniformly pressurize the material, when the liquid medium is injected into the pressure container through the pressure pump, according to the principle of fluid mechanics, the size of its pressure is constant and uniformly transferred to all directions. When the liquid medium is injected into the pressure vessel through the pressure pump, according to the principle of fluid mechanics, the pressure is constant and uniform in size and transmitted to all directions, so the powder in the high pressure vessel is subjected to uniform pressure and uniform in size in all directions. The method of making the powder dense into a blank by the above method is called isostatic forming.
1、The application of isostatic graphite in non-ferrous metallurgy.
In order to shorten the production process, reduce the bottom cost, improve the quality, reduce labor intensity and pollution of the environment, for more than 20 years the production of metal materials gradually to the direction of continuous casting, so far copper, aluminum basically realized the continuous casting production. Isostatic graphite is mainly used in large copper production line, at present, China has hundreds of production lines, are using graphite crystallizer.
2, isostatic graphite in the atomic energy industry applications
In nuclear reactions, nuclear fusion will release a huge amount of energy, to make nuclear fusion for a long time, it is necessary to maintain the plasma at a certain temperature, graphite is an important material to maintain the stability of the plasma. In addition, graphite is also a moderator of neutrons and an excellent reflector, and its own excellent characteristics have established its position in the nuclear industry.
3、The role of isostatic graphite in the solar industry
Because isostatic graphite material has high strength, high density, good isotropic, made of graphite parts in the use of the process of heat, heating are more uniform, and because of the uniform density of the material can effectively reduce the material by the rapid cooling and heating of the internal stress (good thermal shock resistance), so it can greatly extend the life cycle of equipment or apparatus, so in the semiconductor, solar energy industry, a large number of isostatic graphite ( Isotropic graphite), making Cz-type single crystal direct-drawing furnace hot field graphite parts; polysilicon melting casting furnace with heater, compound semiconductor manufacturing with heater and other components.
4、Other aspects.
In addition to the above several main uses, isostatic graphite is widely used in carbide (vacuum furnace heaters, sintering plates, etc.), mining (manufacturing drill molds), chemical industry (heat exchangers and anti-corrosion parts), machinery (mechanical seals), aerospace (nozzles, etc.), and other fields.
Cold Isostatic pressing Mold/Bags/Tooling
