Crucible and heater assembly for crystal growth from a melt

Chemistry: physical processes – Physical processes – Crystallization

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23301SP, 432262, 432265, B01D 900, B01J 1718, F27B 1410

Patent

active

039619052

ABSTRACT:
An annular crucible for containing molten, inorganic crystalline material in an apparatus for growing a plurality of substantially monocrystalline articles including a plurality of spaced forming members disposed in a ring-like arrangement within the crucible, and a pair of annular resistance heating elements concentric with the annular crucible, one element proximate the crucible inner wall and one element proximate the crucible outer wall. In combination with the annular crucible, a thin, ring-shaped resistance heating element substantially conforming in outside and inside diameters to those of the crucible and being disposed at a predetermined distance above the crucible, the ring element having apertures for passing the monocrystalline articles and having means for an independently controllable heat output.

REFERENCES:
patent: 2992517 (1961-07-01), Hicks, Jr.
patent: 3015592 (1962-01-01), Leopold
patent: 3551115 (1970-12-01), Jamieson et al.
patent: 3591348 (1971-07-01), LaBelle, Jr.
patent: 3687633 (1972-08-01), Belle, Jr. et al.
patent: 3877880 (1975-04-01), Kuhlmann-Schafer
patent: 3881037 (1975-04-01), Grandia et al.

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