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Processing and Fabrication of YBa2Cu4O8 and YBa2Cu4O8/YBa2Cu3Ox Composites

Published online by Cambridge University Press:  28 February 2011

U. Balachandran ,
M. E. Biznek ,
K. C. Goretta ,
B. W. Veal  and
R. B. Poeppel
U. Balachandran
Affiliation:
Argonne National Laboratory, Argonne, IL 60439 and T. O. Mason Northwestern University, Evanston, IL 60201
M. E. Biznek
Affiliation:
Argonne National Laboratory, Argonne, IL 60439 and T. O. Mason Northwestern University, Evanston, IL 60201
K. C. Goretta
Affiliation:
Argonne National Laboratory, Argonne, IL 60439 and T. O. Mason Northwestern University, Evanston, IL 60201
B. W. Veal
Affiliation:
Argonne National Laboratory, Argonne, IL 60439 and T. O. Mason Northwestern University, Evanston, IL 60201
R. B. Poeppel
Affiliation:
Argonne National Laboratory, Argonne, IL 60439 and T. O. Mason Northwestern University, Evanston, IL 60201
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Abstract

Powders of YBa2Cu4O8 (“124”) were prepared via solid state reaction of Y2O3, BaCO3, and CuO. The mixed precursors were heated in flowing oxygen of reduced total pressure, followed by cooling and annealing at 750°C under ambient pressure oxygen. The procedure produced orthorhombic 124 as the main phase, with YBa2Cu3Ox (“123”) as a minor impurity phase. Phase purity improved, and nearly phase-pure 124 was obtained, upon annealing the as-calcined powder in flowing oxygen at 800°C.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 169: Symposium M – High Temperature Superconductors: Fundamental Properties and Novel Materials Processing , 1989 , 373
Copyright
Copyright © Materials Research Society 1990

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