Main Uses of Isostatic Graphite

Main uses of isostatic graphite

Heater for Czochralski monocrystalline silicon thermal field and polycrystalline silicon ingot furnace

In the thermal field of Czochralski monocrystalline silicon, the isostatic graphite components include crucibles, heaters, electrodes, heat shielding plates, seed crystal holders, bases for rotating crucibles, various circular plates, heat reflectors, etc. about 30 kind. Among them, 80% of the isostatic graphite is used in the manufacture of crucibles and heaters.

In the manufacturing process of polycrystalline silicon wafers for solar cells, polycrystalline silicon fragments are first melted and cast into polycrystalline silicon ingots. Among them, the heater of the ingot furnace needs to be made of isostatic graphite.

Atomic energy industry

In nuclear fission reactors (high temperature gas-cooled reactors), graphite is a neutron moderator and an excellent reflector.

In nuclear fusion reactors, graphite materials with good thermal conductivity and high mechanical strength are used as the first wall material facing the plasma.

EDM electrode

Electric discharge machining, which mainly uses graphite or copper as electrodes, is widely used in metal molds and other processing fields.

Graphite mold for non-ferrous metal continuous casting

Because the isostatic pressing graphite material has good properties in terms of heat conduction, thermal stability, self-lubrication, anti-wetting and chemical inertness, it becomes an irreplaceable material for making crystallizers.

Other uses

Isostatic graphite is also used to make diamond tools and cemented carbide sintering molds, thermal field components of optical fiber drawing machines (heaters, holding cylinders, etc.), thermal field components of vacuum heat treatment furnaces (heaters, bearing frames, etc.), And precision graphite heat exchangers, mechanical seal components, piston rings, bearings, rocket nozzles, etc.