Graphite targets are divided into isostatic graphite and pyrolytic graphite. The editor of RSM will introduce pyrolytic graphite in detail.
Pyrolytic graphite is a new type of carbon material. It is a pyrolytic carbon with high crystalline orientation which is deposited by chemical vapor on graphite matrix at 1800℃~2000℃ by high purity hydrocarbon gas under certain furnace pressure. It has high density (2.20g/cm³), high purity (impurity content (0.0002%)) and anisotropy of thermal, electrical, magnetic and mechanical properties.This means it has different properties across different planes. In the C plane (across its layers) it has low thermal conductivity, acting as an insulator. In the A-B plane (with the layers) it has very high thermal conductivity, acting as a superb conductor. Our pyrolytic graphite discs and plates are available in three different materials: Substrate Nucleated (PG-SN), Continuously Nucleated (PG-CN), and High Conductivity Substrate Nucleated (PG-HT). Continuously Nucleated (PG-CN) material has physical properties 15-20% higher than that of Substrate Nucleated.Pyrolytic carbon produced in fluidized bed is mainly used for coating the surface of nuclear fuel particles to prevent leakage of fission products. In addition, it is also used to make artificial carbon center valve, bearing, etc. Pyrolytic graphite produced by non fluidized bed is used for throat lining of rocket nozzle, diamagnetic ball for satellite attitude control, electron tube grid, crucible for smelting high-purity metal, brush for voltage regulator, discharge chamber of laser, thermal insulation material for high-temperature furnace, epitaxial sheet for semiconductor production, etc.
Post time: Dec-14-2022