Superconductor technology: apparatus – material – process – Processes of producing or treating high temperature... – Heating – annealing – or sintering
Patent
1992-06-05
1994-12-06
Lieberman, Paul
Superconductor technology: apparatus, material, process
Processes of producing or treating high temperature...
Heating, annealing, or sintering
423593, 505725, 505742, 505501, C01F 1102, C01G 302, H01L 3924
Patent
active
053710665
ABSTRACT:
A precursor material is superoxidized to a superconducting oxide material in an atmosphere containing a reactive component that reacts with and removes hydroxide ion (OH.sup.-), replacing it with peroxide ion (O.sup.-). Preferred reactive components include H.sub.2 O.sub.2, N.sub.2 O, and I.sub.2. The reactive component reacts with and removes hydroxide ion from the precursor material, to reach a higher oxidation state in the superconducting oxide material than possible by oxidation in molecular oxygen. The use of such a reactive component permits both faster oxidation of the precursor material at conventional temperatures and the use of lower temperatures to achieve oxidation.
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Hazen "Superconductivity in High T.sub.c Bi-Ca--Sr-Cu-O . . . " Phys. Rev. Letters vol. 60(12) Mar. 21, 1988 pp. 1174-1177.
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Fuller Keith C.
Gorre, deceased Luisa E.
Pastor Ricardo C.
Pastor, deceased Antonio C.
Boyd John
Denson-Low W. K.
Duraiswamy V. D.
Hughes Aircraft Company
Lieberman Paul
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