초록 ▼

The present invention aims to improve thermal efficiency and to reduce melting time when a raw material in an auxiliary crucible is heated and melted by induction heating method. When an initial raw material 30a is at low temperature and its conductivity is relatively low, a conductive carbon cylind

The present invention aims to improve thermal efficiency and to reduce melting time when a raw material in an auxiliary crucible is heated and melted by induction heating method. When an initial raw material 30a is at low temperature and its conductivity is relatively low, a conductive carbon cylinder 2 is arranged at such a height as to cover the entire side wall of the auxiliary crucible 1, and when high frequency current is applied on a high frequency coil 3, secondary induction current is generated on the carbon cylinder 2. Then, Joule heat is generated on the carbon cylinder 2 by the secondary induction current, and heat of the carbon cylinder 2 is transmitted to the raw material inside via the auxiliary crucible 1. Thus, the raw material is heated, and melting is started. When the raw material is melted, an insulating ceramic base 4 is arranged at such a position as to cover the entire side wall of the auxiliary crucible 1. Because conductivity of the raw material is gradually increased, secondary induction current is generated in the melt 30b, and Joule heat is generated in the melt 30b itself by the secondary induction current.

대표청구항 ▼

1. A single crystal material auxiliary melting apparatus for heating and melting a single crystal raw material in an auxiliary crucible and for supplying melt into a main crucible, said apparatus comprising:a conductive susceptor arranged around said auxiliary crucible so that it can be moved in a v

1. A single crystal material auxiliary melting apparatus for heating and melting a single crystal raw material in an auxiliary crucible and for supplying melt into a main crucible, said apparatus comprising:a conductive susceptor arranged around said auxiliary crucible so that it can be moved in a vertical direction; a coil wound around said susceptor and with high frequency current applied thereon; and means for moving said susceptor in such manner that heating of the raw material in said auxiliary crucible is started by arranging said susceptor at a high position on said auxiliary crucible and by heating said susceptor with secondary induction current, said susceptor is moved aside from said position on said auxiliary crucible after melting of said raw material has been started, and the raw material in said auxiliary crucible is heated by secondary induction current.