Fabrication and texture characterization of bulk (Bi,Pb){sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub x} and Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub x} superconductors

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Bulk (Bi,Pb){sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub x} (Bi-2223) and Bi{sub 2}Sr{sub 2}CaCU{sub 2}0{sub x} (Bi-2212) superconductors were fabricated by sinter forging. Bi-2223 ({approx}90% Bi-2223, 10% (Bi,Pb){sub 2}Sr{sub 2}CaCU{sub 2}0. + other phases) and Bi-2212 (nearly phase pure) powders were first synthesized and then cold pressed into bars that were -50% dense. These bars were surrounded by Ag foil, heated in air to {approx}845{degrees}C, and compressed for 3--6 h. The resultant bars were dense and highly textured. At 77 K, the Bi-2223 exhibited transport critical current density (J{sub c}) values of 2000--8000 A/cm{sup 2}; the Bi-2212 exhibited very low J{sub c}. ... continued below

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7 p.

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Goretta, K.C.; Chen, Nan; Biondo, A.C.; Fisher, B.L.; Lanagan, M.T. & Kallend, J.S. May 1, 1995.

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Bulk (Bi,Pb){sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub x} (Bi-2223) and Bi{sub 2}Sr{sub 2}CaCU{sub 2}0{sub x} (Bi-2212) superconductors were fabricated by sinter forging. Bi-2223 ({approx}90% Bi-2223, 10% (Bi,Pb){sub 2}Sr{sub 2}CaCU{sub 2}0. + other phases) and Bi-2212 (nearly phase pure) powders were first synthesized and then cold pressed into bars that were -50% dense. These bars were surrounded by Ag foil, heated in air to {approx}845{degrees}C, and compressed for 3--6 h. The resultant bars were dense and highly textured. At 77 K, the Bi-2223 exhibited transport critical current density (J{sub c}) values of 2000--8000 A/cm{sup 2}; the Bi-2212 exhibited very low J{sub c}. Extent of texture was evaluated by three X-ray diffraction methods: 2{theta} scans, rocking curves, and orientation distribution functions. It was found that J{sub c} correlated best with the orientation distribution functions.

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7 p.

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OSTI as DE96004298

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  • CEC/ICMC `95: cryogenic engineering conference and international cryogenic materials conference, Columbus, OH (United States), 17-21 Jul 1995

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  • Other: DE96004298
  • Report No.: ANL/ET/CP--84915
  • Report No.: CONF-950722--16
  • Grant Number: W-31-109-ENG-38
  • Office of Scientific & Technical Information Report Number: 201535
  • Archival Resource Key: ark:/67531/metadc669336

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  • May 1, 1995

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  • June 29, 2015, 9:42 p.m.

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  • Dec. 16, 2015, 5:29 p.m.

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Goretta, K.C.; Chen, Nan; Biondo, A.C.; Fisher, B.L.; Lanagan, M.T. & Kallend, J.S. Fabrication and texture characterization of bulk (Bi,Pb){sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub x} and Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub x} superconductors, article, May 1, 1995; Illinois. (digital.library.unt.edu/ark:/67531/metadc669336/: accessed December 14, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.