Development of a scalable Tl-1223 tape process -- thallination of powder precursor coatings
- GE Corporate Research & Development, Schenectady, NY (United States)
- National Renewable Energy Lab., Golden, CO (United States); and others
Superconducting tapes, 10-20 cm long, of TlBa{sub 2}Ca{sub 2}Cu{sub 3}O{sub 9} on Ag have been fabricated by deposition of a thallium-free powder precursor on Ag followed by reaction with a thallium oxide vapor species. Single-sided and two-sided coatings are prepared using a spray-deposition or dip-coating, respectively. The coated tapes are annealed and then mechanically processed to densify the precursor. Continuous thallination of precursor tapes is performed by pulling the coated tape through a two-zone furnace at constant velocity and gave similar results as batch processing. Critical currents of the order 10-20 A at 77K, zero field for a 5 mm wide tape are observed. Properties as a function of magnetic field indicate reduced flux creep compared to the more anisotropic bismuth cuprate superconductors and make thallium 1223 an attractive material for conductor applications at high temperatures.
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 483598
- Report Number(s):
- CONF-950722--
- Journal Information:
- Advances in Cryogenic Engineering, Journal Name: Advances in Cryogenic Engineering Vol. 42B; ISSN 0065-2482; ISSN ACYEAC
- Country of Publication:
- United States
- Language:
- English
Similar Records
Progress in the development of the silver-addition process for preparing textured ``1223`` Tl-Ca-Ba-Cu-oxide thick films
Progress in the development of the silver-addition process for preparing textured ``1223`` Tl-Ca-Ba-Cu-oxide thick films