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

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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{degrees}C and 3 MPa. ... continued below

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7 p.

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Chudzik, M. P.; Polzin, B. J.; Thayer, R.; Picciolo, J. J.; Fisher, B. L. & Lanagan, M. T. August 1996.

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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{degrees}C and 3 MPa. Critical current densities {approx} 1000 A/cm{sup 3} (critical currents of 750 A at 77 K in self-field conditions) were achieved.

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7 p.

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OSTI as DE96015096

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  • Applied superconductivity conference, Pittsburgh, PA (United States), 25-30 Aug 1996

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  • Other: DE96015096
  • Report No.: ANL/ET/CP--88996
  • Report No.: CONF-960850--9
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 383049
  • Archival Resource Key: ark:/67531/metadc679735

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  • August 1996

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  • July 25, 2015, 2:20 a.m.

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  • Dec. 7, 2015, 4:45 p.m.

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Chudzik, M. P.; Polzin, B. J.; Thayer, R.; Picciolo, J. J.; Fisher, B. L. & Lanagan, M. T. Fabrication and characterization of (Bi,Pb)-Sr-Ca-Cu-O (2223) bars, article, August 1996; Illinois. (digital.library.unt.edu/ark:/67531/metadc679735/: accessed October 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.