Adhesive bonding and miscellaneous chemical manufacture – Delaminating processes adapted for specified product – Delaminating in preparation for post processing recycling step
Patent
1986-10-29
1988-04-26
Pal, Asok
Adhesive bonding and miscellaneous chemical manufacture
Delaminating processes adapted for specified product
Delaminating in preparation for post processing recycling step
156607, 156DIG70, 156DIG72, 156DIG82, 156DIG84, 156DIG89, 156DIG92, 156DIG93, 156DIG98, 156DIG62, C30B 2702
Patent
active
047402644
ABSTRACT:
Process and apparatus for growing crystals using float zone techniques. A rod (34) of crystalline materials is disposed in a cylindrical container (36), with a space being left between the rod and container walls. The space is filled with an encapsulant (72), selected to have a slightly lower melting point than the crystalline material. The rod is secured to a container end cap (38) at one end and to a shaft (60) at its other end. A piston (64) slides over the rod and provides pressure to prevent loss of volatile components upon melting of the rod. Prior to melting the rod the container is first heated to melt the encapsulant, with any off-gas from this step being vented to a cavity behind the piston. The piston moves slightly forward owing to volume change upon melting of the encapsulant, and the vent passageway (74) is closed. The container is then moved longitudinally through a heated zone (32) to progressively melt sections of the rod as in conventional float zone processes.
REFERENCES:
patent: 4585511 (1986-04-01), Bult et al.
patent: 4645560 (1987-02-01), Matsumoto et al.
patent: 4654110 (1987-03-01), Morrison
Facemire Barbara R.
Frazier Donald O.
Lehoczky Sandor L.
Naumann Robert J.
Vlasse Marcus
Manning John R.
Pal Asok
Sheehan William J.
The United States of America as represented by the Administrator
Wofford, Jr. Leon D.
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