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Synthesis of YBa2Cu3O7−x fibers from an organic acid solution

Published online by Cambridge University Press:  31 January 2011

S. C. Zhang ,
G. L. Messing ,
W. Huebner  and
M. M. Coleman
S. C. Zhang
Affiliation:
Department of Materials Science and Engineering, Pennsylvania State University, University Park, Pennsylvania 16802
G. L. Messing
Affiliation:
Department of Materials Science and Engineering, Pennsylvania State University, University Park, Pennsylvania 16802
W. Huebner
Affiliation:
Department of Materials Science and Engineering, Pennsylvania State University, University Park, Pennsylvania 16802
M. M. Coleman
Affiliation:
Department of Materials Science and Engineering, Pennsylvania State University, University Park, Pennsylvania 16802
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Abstract

A process has been developed for the synthesis of YBa2Cu3O7−x superconducting fibers from an organic acid precursor solution. Through rheology measurements on a series of precursor solutions, the molecular structure was determined and subsequently controlled to allow for fiber drawing. For solutions with a viscosity ⋛10 poise, fibers of 1 to 2 m length and 50 ∼ 100 μm diameter can be hand drawn at ≍80 °C. Processing methods were developed to circumvent deformation of the thermoplastic fibers during heating and to minimize BaCO3 formation during decomposition. Fibers sintered at 850 °C for 1 h in 10−2 atm O2, followed by annealing at 500 °C for 4 h in O2, were fully dense, consisted of submicron grains, and were superconducting.

Type
Articles
Information
Journal of Materials Research , Volume 5 , Issue 9 , September 1990 , pp. 1806 - 1812
Copyright
Copyright © Materials Research Society 1990

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