Abstract
Superconducting tapes, 10–20 cm long, of TlBa2Ca2Cu3O9 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 density 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.
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© 1996 Springer Science+Business Media New York
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Tkaczyk, J.E., Lay, K.W., Schulz, D., Parilla, P.A. (1996). Development of a Scalable Tl-1223 Tape Process — Thallination of Powder Precursor Coatings. In: Summers, L.T. (eds) Advances in Cryogenic Engineering Materials . Advances in Cryogenic Engineering Materials , vol 42. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-9059-7_116
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DOI: https://doi.org/10.1007/978-1-4757-9059-7_116
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