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Development of high Tc (greater than 100 K) Bi, Tl and Y-based materials as superconducting circuit elements

Author
Haertling, Gene
Published
Mar 31, 1993.
Physical Description
1 electronic document
Additional Creators
Grabert, Gregory and Gilmour, Phillip
Online Version

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Summary
Results on this project over the past three years have shown that the Bi and Tl-based superconducting materials in bulk form are noticeably different from the Y-based 123 material in that superconductivity is considerably harder to achieve, maintain and reproduce. This is due primarily to the difficulty in obtaining the higher Tc phase in pure form since it commonly co-exists with other undesirable, lower Tc phases. In particular, it has been found that long processing times for calcining and firing (20 - 200 hrs.) and close control of temperatures which are very near the melting point are required in order to obtain higher proportions of the desirable, high Tc (2223) phase.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 19930016030.
Accession ID: 93N25219.
NAS 1.26:192344.
NASA-CR-192344.
Terms of Use and Reproduction
No Copyright.
View MARC record | catkey: 15670638