Method for forming refractory tubing

Details Method for forming refractory tubing Method for forming refractory tubing

1975-08-14

1980-04-08

Emery, Stephen J.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

156DIG80, 156DIG88, B01J 1710

Patent

active

041971574

ABSTRACT:
Refractory tubings, either in amorphous, polycrystalline or single crystal form, are made by moving a preformed tubing of a refractory material and a heated zone relative to each other, the heating zone providing sufficient heat to melt through the tubing and form a molten ring which is continuously advanced through the tubing. The heat source may be located externally or internally of the tubing wall or in both positions. The tubings may be formed as single crystals by using appropriate seeds; and by controlling the rate of movement of the tubing sections on either side of the molten ring the wall thickness and diameter of the final tubing may be adjusted.

REFERENCES:
patent: 3397042 (1968-08-01), Hunt
patent: 3401023 (1968-09-01), Mullin
patent: 3494742 (1970-02-01), Kuba
Pfann et al., Improvement In Floating Zone Technique, J. of App. Phy., vol. 30, #4, 1959, pp. 454 to 455. _

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