FIELD: electrical engineering.
SUBSTANCE: proposed superconducting device has superconducting oxide wire made of superconducting oxide material whose post-sintering density is 93% and more, best 95% and more, or most preferably 99% or more, which is attained by heat treatment of wire in enhanced pressure environment of at least 1 MPa and below 50 MPa. Heat treatment of wire at enhanced pressure prevents formation of gaps and bubbles. Stable superconducting oxide phase of Bi2223 is formed in the process.
EFFECT: enhanced critical current density of superconducting device and superconducting cable.
6 cl, 27 dwg, 4 tbl, 6 ex
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|---|---|---|---|
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