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The Effect of the Distribution of Ag in High TC Bi- Compound Superconductors

Published online by Cambridge University Press:  28 February 2011

Alexis S. Nash ,
K. C. Goretta ,
Philip Nash ,
R. B. Poeppel  and
Donglu Shi
Alexis S. Nash
Affiliation:
Marquette University, Milwaukee, WT, 53233
K. C. Goretta
Affiliation:
Argonne National Laboratory, Argonne, IL 60439
Philip Nash
Affiliation:
Illinois Institute of Technology, Chicago, IL 60616
R. B. Poeppel
Affiliation:
Argonne National Laboratory, Argonne, IL 60439
Donglu Shi
Affiliation:
Argonne National Laboratory, Argonne, IL 60439
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Abstract

A series of 4336 Bi‐Sr‐Ca‐Cu oxide samples doped with 1 to 5% metallic Ag was prepared by solid state reaction. The distribution of Ag, the microstructure and the crystal structure of the samples were studied using energy dispersive spectrometry, EDS, scanning electron microscopy, SEM, and x‐ray diffractometry, XRD. Addition of Ag leads to a marked increase in preferred orientation with (001) planes perpendicular to the pressing direction in sintered pellets. The resistivity‐temperature data show an enhanced Tc in Ag‐doped samples under certain conditions. Energy dispersive spectrometry indicates that the dopant mostly segregates to the grain boundaries.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 169: Symposium M – High Temperature Superconductors: Fundamental Properties and Novel Materials Processing , 1989 , 1287
Copyright
Copyright © Materials Research Society 1990

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References

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