Process for producing tubular moldings from high-temperature...

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

H - Electricity

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H01L 39/24 (2006.01) B22D 13/02 (2006.01) C04B 35/45 (2006.01) C04B 35/653 (2006.01)

Patent

CA 2094559

HOE 92/H 011 Process for producing tubular moldings from high-temperature superconducting material Abstract In order to produce tubular moldings of high-temperature superconducting material based on oxides of bismuth, calcium, strontium, copper and optionally lead, a homo- geneous melt of the oxide mixture in a predefined stoichiometry having temperatures from 900 to 1300°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° 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°C in an oxygen-containing atmosphere.

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