Device for manufacturing single crystals

Details Device for manufacturing single crystals Device for manufacturing single crystals

1999-04-06

2000-09-12

Utech, Benjamin L.

Chemical apparatus and process disinfecting, deodorizing, preser

Physical type apparatus

Crystallizer

117217, B01D 900, C30B 3500

Patent

active

061174025

ABSTRACT:
This invention provides a device for manufacturing single crystals provided with an after-cooler that causes an abrupt temperature gradient along the axis of the crystal being lifted. The device according to this invention can further increase the lifting speed of single crystals. The after-cooler (4) is disposed between the single crystal (5) being lifted and the heat-shield plate (1). Both the inner surface facing the single crystal (5) and the outer surface facing the heat-shield plate (1) of the after-cooler have a surface emissivity value larger than 0.6. Furthermore, the after-cooler (4) is made of cooling pipes or cooling jackets, and the surfaces of the after-cooler (4) are treated by oxidizing or nitriding so as to increase their emissivity values.

REFERENCES:
patent: 5567399 (1996-10-01), Von Ammon et al.
patent: 6036776 (2000-03-01), Kotooka et al.

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