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Superconducting Fibers from Anhydrous Metal Carboxylates

Published online by Cambridge University Press:  28 February 2011

Richard M. Laine ,
Kay A. Youngdahl ,
Richard A. Kennish ,
Martin L. Hoppe ,
Zhi-Fan Zhang  and
D. Jean Ray
Richard M. Laine
Affiliation:
Contribution from the Polymeric Materials Laboratory of the Washington Technology Center and the Dept of Materials Science and Engineering, University of Washington, Seattle, WA 98195
Kay A. Youngdahl
Affiliation:
Contribution from the Polymeric Materials Laboratory of the Washington Technology Center and the Dept of Materials Science and Engineering, University of Washington, Seattle, WA 98195
Richard A. Kennish
Affiliation:
Contribution from the Polymeric Materials Laboratory of the Washington Technology Center and the Dept of Materials Science and Engineering, University of Washington, Seattle, WA 98195
Martin L. Hoppe
Affiliation:
Contribution from the Polymeric Materials Laboratory of the Washington Technology Center and the Dept of Materials Science and Engineering, University of Washington, Seattle, WA 98195
Zhi-Fan Zhang
Affiliation:
Contribution from the Polymeric Materials Laboratory of the Washington Technology Center and the Dept of Materials Science and Engineering, University of Washington, Seattle, WA 98195
D. Jean Ray
Affiliation:
Contribution from the Polymeric Materials Laboratory of the Washington Technology Center and the Dept of Materials Science and Engineering, University of Washington, Seattle, WA 98195
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Abstract

A variety of anhydrous Y, Ba and Cu carboxylates were synthesized and screened for utility as spinnable precursors to 123 superconducting fibers. Simple extrusion studies demonstrate that THF solutions of mixtures of Y, Ba and Cu isobutyrates with some Ba 2-ethyl- hexanoate can be used to form 70 μm dia. precursor fibers. Following a curing at 150°C for 24–48 h, pyrolysis of these fibers in air to 900°C, with controlled heating rates, gives dense, flexible ceramic fibers 15–20 μm in dia. These fibers have the appropriate orthorhombic phase. Flux exclusion measurements indicate the fibers are superconducting; but ΔTc is not optimal.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 180: Symposium A – Better Ceramics Through Chemistry IV , 1990 , 865
Copyright
Copyright © Materials Research Society 1990

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References

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