Apparatus for casting silicon with gradual cooling

Details Apparatus for casting silicon with gradual cooling Apparatus for casting silicon with gradual cooling

1989-06-30

1990-04-10

Kellogg, Arthur

Glass manufacturing

Means shaping preform from granular material with fusion means

65 181, 65 184, 65335, C03B 3702

Patent

active

049157230

ABSTRACT:
For the continuous casting of silicon, an electrically conductive bottomless crucible is circumferentially divided by axial slits and is positioned within an electrical induction coil. The slits form circumferential gaps of between 0.3 mm and 1.0 mm and the inner wall of the crucible is inclined by between 0.4.degree. and 2.0.degree., so that the crucible expands in the downstream direction of movement of the silicon. In order to reduce the temperature gradient of the solidified silicon to between 20.degree. C./cm and 100.degree. C./cm, an additional heating element is disposed downstream of the boundary surface between the molten and solidified silicon. The crucible may be cooled by forming the crucible as a double walled cylinder and flowing a coolant therethrough.

REFERENCES:
patent: 1537036 (1925-05-01), Miller
patent: 2958161 (1960-11-01), Palmer
patent: 3261676 (1966-07-01), Morelock
patent: 3320045 (1967-05-01), Weiss et al.
patent: 3527587 (1970-09-01), Velev et al.
patent: 4617041 (1986-10-01), Meerman

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