The influence of starting precursors on grain growth, microstructure evolution and JC property of Bi-2223/Ag tapes

The grain growth, microstructure evolution and Jc properties of Bi-2223/Ag tapes, fabricated from precursor powders with different lead contents (Pb=0.2-0.4) and particle size distributions, were compared. The experimental results show that the variations of lead content and particle sizes extremely...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2003-06, Vol.13 (2), p.3014-3017
Main Authors: YOO, Jaimoo, JIANG, Chunhai, KO, Jaewoong, KIM, Youngkuk, KIM, Haidoo, CHUNG, Hyungsik
Format: Article
Language:English
Subjects:
Applied sciences
Bi-based cuprates
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Cuprates superconductors (high tc and insulating parent compounds)
Electrical engineering. Electrical power engineering
Exact sciences and technology
Materials
Physics
Superconductivity
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Summary:The grain growth, microstructure evolution and Jc properties of Bi-2223/Ag tapes, fabricated from precursor powders with different lead contents (Pb=0.2-0.4) and particle size distributions, were compared. The experimental results show that the variations of lead content and particle sizes extremely influence the reactivity of precursor powders, consequently, the formation rate of the 2223 phase, microstructure and Jc values of Bi-2223/Ag tapes. In addition, these variables also affect the formation and distribution of the nonsuperconducting secondary phases, hence the grain connectivity and texture, which are of vital importance to the current transport. By optimizing these powder parameters, Jc values above 60 kA/cm(2) (77 K, 0 T) in short tapes were achieved with high reproducibility.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2003.812055