Superconductor technology: apparatus – material – process – High temperature – per se – Having tc greater than or equal to 150 k
Patent
1990-06-28
1991-10-22
Beck, Shrive
Superconductor technology: apparatus, material, process
High temperature , per se
Having tc greater than or equal to 150 k
505728, 427 62, 427343, 156637, B05D 512, C23F 100
Patent
active
050595814
ABSTRACT:
The surface of high temperature superconductors such as YBa.sub.2 Cu.sub.3 O.sub.7-x are passivated by reacting the native Y, Ba and Cu metal ions with an anion such as sulfate or oxalate to form a surface film that is impervious to water and has a solubility in water of no more than 10.sup.-3 M. The passivating treatment is preferably conducted by immersing the surface in dilute aqueous acid solution since more soluble species dissolve into the solution. The treatment does not degrade the superconducting properties of the bulk material.
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Adams Harold W.
Beck Shrive
Jones Thomas H.
King Roy V.
Manning John R.
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