Fabrication and characterization of (Bi,Pb)-Sr-Ca-Cu-O (2223) bars

M. P. Chudzik, B. J. Polzin, R. Thayer, J. J. Picciolo, B. L. Fisher, M. T. Lanagan

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2 Scopus citations


Bulk bars for current lead applications were fabricated from (Bi,Pb)-Sr-Ca-Cu-O (Bi-2223) for low thermal conductivity and high critical current. Bars measuring 17. 8 cm in length were made by uniaxially pressing Bi-2223 powder of controlled (1. 7/0. 34)223 and (1. 8/0. 4)223 phase composition. The bulk bars were densified by subjecting them to a schedule of alternate liquid-phase sintering and cold isostatic pressing. Liquid-phase sintering temperatures were optimized from differential thermal analysis and microstructure morphology. Phase purity and microstructure were evaluated by X-ray diffraction and scanning electron microscopy. Low-resistance silver contacts were applied to the bars by hot-pressing at 820°C and 3 MPa. Critical current densities ≈ 1000 A/cm2 (critical currents of 750 A at 77 K in self-field conditions) were achieved.

Original languageEnglish (US)
Pages (from-to)2102-2105
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Issue number2 PART 2
StatePublished - 1997

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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