Synthesis of YBa₂Cu₃O₇₋ₓ Fibers From an Organic Acid Solution
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.
S. C. Zhang et al., "Synthesis of YBa₂Cu₃O₇₋ₓ Fibers From an Organic Acid Solution," Journal of Materials Research, vol. 5, no. 9, pp. 1806 - 1812, Cambridge University Press, Sep 1990.
The definitive version is available at https://doi.org/10.1557/JMR.1990.1806
Materials Science and Engineering
Keywords and Phrases
Chemical Reactions - Decomposition; Copper Oxides - Fibers; Oxides - Fibers; Rheology - Measurements; Yttrium Compounds - Fibers; Organic Acid Precursor Solution; Oxide Superconductors; Precursor Decomposition; Superconducting Fibers; Viscous Organic Precursor; Yttrium Barium Copper Oxide Fibers; Superconducting Materials
International Standard Serial Number (ISSN)
Article - Journal
© 1990 Cambridge University Press, All rights reserved.
01 Sep 1990