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Oxide Films for the Protection of Cuprate Superconductors

Published online by Cambridge University Press:  28 February 2011

Ronald H. Baney ,
Debora F. Bergstrom ,
Leslie E. Carpenter ,
Donald R. Petersen ,
Dennis F. Elwell ,
Andrew A. Shapiro  and
Paul S. Fleishner
Ronald H. Baney
Affiliation:
Dow Corning Corporation, Midland MI
Debora F. Bergstrom
Affiliation:
Dow Corning Corporation, Midland MI
Leslie E. Carpenter
Affiliation:
Dow Corning Corporation, Midland MI
Donald R. Petersen
Affiliation:
Dow Corning Corporation, Midland MI
Dennis F. Elwell
Affiliation:
Hughes Aircraft Company, Newport Beach, CA
Andrew A. Shapiro
Affiliation:
Hughes Aircraft Company, Newport Beach, CA
Paul S. Fleishner
Affiliation:
Hughes Aircraft Company, Newport Beach, CA
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Abstract

The cuprate superconductors rapidly degrade in moisture and in the presence of organic compounds. A protection method has been developed with a coating process using sol/gel routes to the low temperature formation of oxide films. In contrast to traditional protective films, amorphous silica films formed from a solution precursors gave excellent protection and caused little degradation of the superconductors.

The protective abilities of the films were assessed by monitoring the degradation of Y1Ba2Cu307-d in the presence of 85% relative humidity at 85 C. Volume magnetic susceptibility, four-point probe resistivity, current density measurements and x-ray diffraction were performed. Without protection, degradation was almost complete within 30 minutes of exposure. With protection, superconducting properties were maintained even after 48 hours of exposure.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 169: Symposium M – High Temperature Superconductors: Fundamental Properties and Novel Materials Processing , 1989 , 1141
Copyright
Copyright © Materials Research Society 1990

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