| 摘要 |
1,246,262. Zone-melting. H. F. A. TOPSOE. 15 Nov., 1968 [16 Nov., 1967], No. 52181/67. Heading B1S. In the zone-melting of a silicon rod by induction-heating, annealing is effected by means of heat radiated from an induction-heated split cylinder surrounding the rod. As shown, the induction-heating means comprises a small coil 3 and a large coil 4; and the annealing means comprises a cylinder having a slit 9 along its whole length and slits 7 forming flaps 8 which are outwardly bent at an angle of 45‹. In a modification, the thickness of the cylinder increases from the bottom to the top or a third induction coil surrounds the cylinder. The cylinder may be of silicon or graphite. |
