Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9841622 | Physica C: Superconductivity and its Applications | 2005 | 5 Pages |
Abstract
Several kinds of precursor powders with varied phase assemblages were prepared by pre-annealing the commercial BSCCO 2223 powders in pure Ar, O2 or mixed gas (7.5% O2 + 92.5% Ar) at elevated temperatures, and then were made into monofilament Bi-2223/Ag tapes. Annealing the powders in pure Ar at 700 °C for 10 h greatly retarded the 2223 phase formation at the initial reaction stage, consequently lowered the Jc value of the fully processed Bi-2223/Ag tapes. The sample fabricated by using the precursor powder pre-annealed in 7.5% O2 showed the best Jc property (25 kA/cm2, 77 K, 0 T). The microstructures of the samples made from various precursor powders were examined, which were correlated to their different phase formation behaviors and transport properties.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
C.H. Jiang, H. Kumakura,