Graphite crucible for silicon electromagnetic induction heating and apparatus for silicon melting and refining using the graphite crucible

摘要

Disclosed herein are a graphite crucible for electromagnetic induction-based silicon melting and an apparatus for silicon melting/refining using the same, which performs a melting operation by a combination of indirect melting and direct melting. The crucible is formed of a graphite material and includes a cylindrical body having an open upper part through which a silicon raw material is charged into the crucible, and an outer wall surrounded by an induction coil, wherein a plurality of slits are vertically formed through the outer wall and an inner wall of the crucible such that an electromagnetic force created by an electric current flowing in the induction coil acts toward an inner center of the crucible to prevent a silicon melt from contacting the inner wall of the crucible.

主权项

1. A graphite crucible for electromagnetic induction-based silicon melting, the crucible being formed of a graphite material and comprising a cylindrical body having an open upper part through which a silicon raw material is chargeable into the crucible, wherein an entirety of the cylindrical body comprises the graphite material, and an outer wall surround by an induction coil, wherein a plurality of slits are vertically formed through the outer wall and an inner wall of the crucible, the induction coil and the plurality of slits are configured to generate an electromagnetic force toward an inner center of the crucible to prevent a silicon melt from contacting the inner wall of the crucible, and to maintain a temperature at a bottom surface of the cylindrical body higher than a temperature at each slit of the plurality of slits.