Progress in the development of the silver-addition process for preparing textured ``1223`` Tl-Ca-Ba-Cu-oxide thick films
- GE Corporate R and D Center, Schenectady, NY (United States)
- Oak Ridge National Lab., TN (United States)
Progress in key areas is reported for the continued development of the silver-addition process for preparing textured ``1223`` Tl-Ca-Ba-Cu-oxide thick films; film homogeneity, film growth mechanism, scale-up, and flexible substrates. As a consequence of refinements in the precursor oxide film preparation and the development of a ``flow`` reactor, superconducting films on polycrystalline YSZ have beep prepared that exhibit zero-field J{sub c} values (77K) as high as 366,000 A/cm{sup 2}. Advantage has been taken of these process improvements to prepare a textured ``1223`` thick film with {Tc} = 109K on a zirconia coated metal substrate. When placed in a magnetic field there is an initial drop in J{sub c}, attributed to the presence of weak links. However, after this initial drop, the film exhibits the characteristic behavior expected of strongly linked ``1223``. The film growth mechanism underlying the silver-addition process is discussed in light of the results of microstructural studies of samples quenched at different times into the thallination process.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 43022
- Report Number(s):
- CONF-9310224--; ISBN 0-87339-271-X
- Country of Publication:
- United States
- Language:
- English
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