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Passivation of high temperature superconductorsThe surface of high temperature superconductors such as YBa2Cu3O(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(exp -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.
Document ID
19920001463
Acquisition Source
Legacy CDMS
Document Type
Other - Patent
Authors
Vasquez, Richard P. (Jet Propulsion Lab. California Inst. of Tech., Pasadena., United States)
Date Acquired
August 15, 2013
Publication Date
October 22, 1991
Subject Category
Solid-State Physics
Report/Patent Number
Patent Number: NASA-CASE-NPO-17949-1-CU
Patent Number: US-PATENT-5,059,581
Patent Application Number: US-PATENT-APPL-SN-545016
Accession Number
92N10681
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
NASA-CASE-NPO-17949-1-CU|US-PATENT-5,059,581
Patent Application
US-PATENT-APPL-SN-545016

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