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Hyper- and Hypobaric Processing of T1-Ca-Ba-Cu-O Superconductors

Published online by Cambridge University Press:  28 February 2011

K. C. Goretta ,
J. L. Routbort ,
Donglu Shi ,
J. G. Chen ,
Ming Xu  and
M. C. Hash
K. C. Goretta
Affiliation:
Argonne National Laboratory, Argonne, IL 60439.
J. L. Routbort
Affiliation:
Argonne National Laboratory, Argonne, IL 60439.
Donglu Shi
Affiliation:
Argonne National Laboratory, Argonne, IL 60439.
J. G. Chen
Affiliation:
Argonne National Laboratory, Argonne, IL 60439.
Ming Xu
Affiliation:
Argonne National Laboratory, Argonne, IL 60439.
M. C. Hash
Affiliation:
Argonne National Laboratory, Argonne, IL 60439.
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Abstract

Tl-based superconductors of initial composition Tl:Ca:Ba:Cu equal to 2:2:2:3 and 1:3:1:3 were heated in oxygen at pressures of 104 to 6 x 105 Pa. The 2:2:2:3 composition formed primarily the 2-layer superconductor with zero resistance from 77 to 104 K. The 1:3:1:3 composition formed nearly phase pure 3-layer superconductor with a maximum zero resistance temperature of 120 K. Application of hyperbaric pressure influenced phase purities and transition temperatures slightly; phase purities decreased significantly with application of hypobaric pressures.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 169: Symposium M – High Temperature Superconductors: Fundamental Properties and Novel Materials Processing , 1989 , 365
Copyright
Copyright © Materials Research Society 1990

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