Bi-rich BiPbSrCaCuO (2-2-2-3) superconducting tapes

D. Y. Kaufman, M. T. Lanagan, T. A. Ballen, S. E. Dorris, J. T. Dawley, R. B. Poeppel

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The microstructural and electrical properties of Ag clad BiyPb0.4Sr2Ca2Cu3Ox (y = 1.8, 2.0 and 2.3) powder-in-tube tapes were investigated. The highest Jc values (2000 A/cm2 at 77 K and 0 T) were obtained for tapes of powders y = 1.8 and 2.0 following a 150 h thermomechanical routine at 855°C. The presence of alkaline earth second phases was not diminished by the addition of bismuth. The phase equilibria were observed to shift from 2-2-2-3+ Sr14-xCaxCu24O48 + SrxCa2-xCuO3 to 2-2-2-3 + SrxCa2-xCuO3 + CuO as the Bi content was increased from y = 1.8 to 2.0. (Sr,Ca)2PbO4 and 2-2-1-2 were present as by-product phases at temperatures above and below 855°C. Higher Bi content (y = 2.3) caused formation of the 2-2-1-2 phase as the 2-2-2-3 became Bi-saturated.

Original languageEnglish (US)
Pages (from-to)1-4
Number of pages4
JournalMaterials Letters
Issue number1-2
StatePublished - Nov 1993

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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