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Evolution of the High Tc Phase in Rapidly Solidified Bi-Ca-Sr-Cu Oxides

Published online by Cambridge University Press:  28 February 2011

A. Asthana ,
P.D. Han ,
Z. Xu ,
L. Chang ,
D.A. Payne  and
P.J. Gilbert
A. Asthana
Affiliation:
Department of Materials Science and Engineering, Materials Research Laboratory, and Science and Technology Center for Superconductivity, University of Illinois at Urbana-Champaign, Urbana, IL. 61801, USA.
P.D. Han
Affiliation:
Department of Materials Science and Engineering, Materials Research Laboratory, and Science and Technology Center for Superconductivity, University of Illinois at Urbana-Champaign, Urbana, IL. 61801, USA.
Z. Xu
Affiliation:
Department of Materials Science and Engineering, Materials Research Laboratory, and Science and Technology Center for Superconductivity, University of Illinois at Urbana-Champaign, Urbana, IL. 61801, USA.
L. Chang
Affiliation:
Department of Materials Science and Engineering, Materials Research Laboratory, and Science and Technology Center for Superconductivity, University of Illinois at Urbana-Champaign, Urbana, IL. 61801, USA.
D.A. Payne
Affiliation:
Department of Materials Science and Engineering, Materials Research Laboratory, and Science and Technology Center for Superconductivity, University of Illinois at Urbana-Champaign, Urbana, IL. 61801, USA.
P.J. Gilbert
Affiliation:
Division of Ceramics, School of Materials, University of Leeds, Leeds, LS2 9JT, UK.
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Abstract

Materials in the system Bi-Ca-Sr-Cu-O were prepared by rapid solidification. Emphasis was placed on optimizing processing conditions for enhancement of the high Tc (2223) phase. A number of starting compositions and heat-treatments were investigated. The effect of dopants (such as, Pb, Sb, Ge, Sn) on the stabilization of the high Tc phase was evaluated. Small amounts of Pb and Sb were effective in significantly increasing the 2223 yield. Improvements in superconducting properties as a function of 2223 evolution are discussed with reference to SEM, TEM, XRD and SQUID results.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 169: Symposium M – High Temperature Superconductors: Fundamental Properties and Novel Materials Processing , 1989 , 329
Copyright
Copyright © Materials Research Society 1990

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