Wacker-chemitronic Gesellschaft Fur Elektronik-grundstoffe Mbh

Adalbert Ellbrunner

Horst Stock

Georg Priewasser

Friedrich Georg

A process and apparatus for the regeneration of shaped carbon, and especially graphite, bodies used in the presence of molten silicon. The shaped bodies are heated in an inert atmosphere to a temperature in the range of from 1700.degree. to 3000.degree. C. and maintained at this temperature for a defined period of time. The process substantially prolongs the service life of the shaped bodies. The apparatus includes at least one evacuable loading chamber, and evacuable heatable heating chamber connected to the loading chamber and an evacuable coolable cooling chamber connected to the heating chamber. A support capable of moving between the loading, heating and cooling chambers is adpated for receiving the shaped bodies to be regenerated.

Process for the regeneration of shaped carbon bodies

A process for the production of a monocrystalline silicon rod by withdrawal rom a silicon melt in a drawing chamber by means of a drawing spindle, comprises passing a stream of a protective gas, such as argon, into said chamber during the drawing operation and through a tube which surrounds the drawing spindle and the growing silicon rod, the chamber being maintained under reduced pressure.

Process for the production of monocrystalline silicon rods

A residual melt of liquid silicon is removed from a crucible containing the ame by immersing in the melt a capillary body of carbon felt, the melt being absorbed by the capillary body, and removing the capillary body and absorbed melt from the crucible.

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Seibersdorf, Germany

Adalbert Ellbrunner