The influence of process variables of precursor powders on the microstructure evolution and transport current properties of Bi-2223/Ag tapes

The effect of Pb content and particle size of precursor powders has been studied to improve the grain growth and texture of Bi-2223/Ag tapes. The Pb content and particle size of precursor powders dominate the amount of liquid phases, and thus affect the value of J c with a variation of heat treatmen...

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Bibliographic Details
Published in:Physica. C, Superconductivity Superconductivity, 2002-08, Vol.372, p.1005-1008
Main Authors: Yoo, Jaimoo, Ko, Jaewoong, Kang, Shinchul, Kim, Haidoo, Jiang, Chunhai, Chung, Hyungsik
Format: Article
Language:English
Subjects:
Bi-2212
Bi-2223
BSCCO wires and tapes
Particle size
Pb content
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Summary:The effect of Pb content and particle size of precursor powders has been studied to improve the grain growth and texture of Bi-2223/Ag tapes. The Pb content and particle size of precursor powders dominate the amount of liquid phases, and thus affect the value of J c with a variation of heat treatment condition. The best values of J c reached 53 kA/cm 2 at 77 K and 0 T, after 210 h heat treatment at 839 °C and two times intermediate pressing. It suggests that the improvement of J c characterized from high fraction of Bi-2223 with enlarged crystallites is attainable by optimizing the processing variables of precursor powders.
ISSN:0921-4534
1873-2143
DOI:10.1016/S0921-4534(02)00957-7