Progress in the development of the silver-addition process for preparing textured ``1223`` Tl-Ca-Ba-Cu-oxide thick films
Conference
·
OSTI ID:10154669
- General Electric Corp., Schenectady, NY (United States). Research and Development Center
- 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 been 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:
- Oak Ridge National Lab., TN (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 10154669
- Report Number(s):
- CONF-931009--26; ON: DE94012333
- Country of Publication:
- United States
- Language:
- English
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