Method and apparatus for growth of single crystal material in sp

Details Method and apparatus for growth of single crystal material in sp Method and apparatus for growth of single crystal material in sp

1986-04-01

1987-11-03

Pal, Asok

Chemical apparatus and process disinfecting, deodorizing, preser

Physical type apparatus

Crystallizer

156606, 156607, 156608, 156611, 156612, 156DIG62, 156DIG83, 156DIG98, B01B 900

Patent

active

047042583

ABSTRACT:
An ampoule assembly for the growth of single crystal materials is particularly adapted for a micro-gravity environment and includes a plurality of centering rods for spacing a crystalline material from the inner surface of an ampoule. The centering rods are spaced relative to one another to form a dopant vapor passageway to provide uniform stoichiometry of the crystal upon melting and resolidification. Minimum contact between ampoule and the crystalline material ensures greater purity of the crystalline material when the material is transformed into a single crystal.

REFERENCES:
patent: 3534926 (1970-10-01), Wuencher
patent: 3568757 (1971-03-01), Piearcey
patent: 3842895 (1974-10-01), Mehrabian et al.
patent: 4285760 (1981-08-01), Myer
patent: 4298191 (1981-11-01), Atkinson et al.
patent: 4307769 (1981-12-01), Hauser et al.
T. Burkhalter, "The Industrial Research Laboratory in Space," Advances in Astronautical Sciences, vol. 23, 1968, pp. 211-219.
R. Schwinghamer, "Magnetic Forming in Space," Astronautics, Sep. 1962, pp. 63-67.
V. Kirkland, "Design of a Commercial Space Station," Advances in Astronautical Sciences, vol. 23, 1968, pp. 220-221.

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