Superconductor technology: apparatus – material – process – Processes of producing or treating high temperature... – Heating – annealing – or sintering
Patent
1994-06-21
1996-09-17
McGinty, Douglas J.
Superconductor technology: apparatus, material, process
Processes of producing or treating high temperature...
Heating, annealing, or sintering
505126, 505480, 505778, 505780, 505815, 505742, 505779, 505490, H01L 3912, C04B 3545, C04B 3550, C04B 3564
Patent
active
055568319
ABSTRACT:
A method of treating a part made of a superconductive ceramic of the (Ln).sub.1 Ba.sub.2 Cu.sub.3 O.sub.7-.delta. type, where Ln is chosen from the rare earth elements other than cerium and terbium, the method being designed to reduce the value of .delta., in which method said part is heat treated in an oxidizing atmosphere, said method being wherein, during said treatment, an electric current with a density lying in the range 0.1 A/cm.sup.2 to 2 A/cm.sup.2 is caused to flow through said part, said treatment atmosphere having a partial pressure of oxygen lying in the range 0.1 atmospheres to 1 atmosphere, the treatment temperature lying in the range 200.degree. C. to 500.degree. C., and the duration of said treatment lying in the range 1 hour to 200 hours.
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Bonnet Jean-Pierre
Dordor Patrice
Magro Christophe
Sanz Mariano
Wicker Alain
Alactel Alsthom Compagnie Generale d'Electricite
McGinty Douglas J.
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