Forging cylindrical ingots of alkali halides

Details Forging cylindrical ingots of alkali halides Forging cylindrical ingots of alkali halides

1996-07-22

1998-08-11

Garrett, Felisa

Single-crystal, oriented-crystal, and epitaxy growth processes;

Processes of growth with a subsequent step acting on the...

117 1, 117 3, 117937, C30B 1536

Patent

active

057922535

ABSTRACT:
A cylindrical alkali halide single-crystal-type ingot having an axis compressed in a heated dual platen press. To produce an approximately rectangular compressed ingot that is devoid of cracks and fissures at and adjacent the periphery, the surface of the ingot is flatted. For crystals having a face-centered lattice (e.g. NaI), the flat is parallel to the (100) crystallographic plane. For crystals having a body-centered lattice (e.g. CsI), the flat is parallel to the (110) crystallographic plane. The flat is placed on the lower platen of the press to properly orient the crystallographic structure of the ingot with respect to the direction of compression.

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patent: 4203951 (1980-05-01), Goriletsky et al.
patent: 4410468 (1983-10-01), Packer
patent: 4522865 (1985-06-01), Packer

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