Process for producing tubular moldings from high-temperature sup

Details Process for producing tubular moldings from high-temperature sup Process for producing tubular moldings from high-temperature sup

1996-06-25

1999-08-31

Fiorilla, Christopher A.

Superconductor technology: apparatus, material, process

Processes of producing or treating high temperature...

With melting

264104, 264235, 264310, 264311, H01L 3900

Patent

active

059453842

ABSTRACT:
In order to produce tubular moldings of high-temperature superconducting material based on oxides of bismuth, calcium, strontium, copper and optionally lead, a homogeneous melt of the oxide mixture in a predefined stoichiometry having temperatures from 900 to 1300.degree. C. is made to flow into a casting zone. The casting zone, as a function of its internal diameter, rotates at from 200 to 1500 rpm about its axis which is inclined by at least 15.degree. with respect to the horizontal. The solidified molding is taken from the casting zone and annealed for from 4 to 150 hours at from 700 to 900.degree. C. in an oxygen-containing atmosphere.

REFERENCES:
patent: 5253697 (1993-10-01), Lajoye et al.
patent: 5262366 (1993-11-01), Yamakawa et al.

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