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
- Argonne National Lab., IL (United States); and others
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}O{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}O{sub x} + other phases) and Bi-2212 (nearly phase pure) powders were first synthesized and then cold pressed into bars that were {approx}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: 20 scans, rocking curves, and orientation distribution functions. It was found that J{sub c} correlated best with the orientation distribution functions.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 482080
- Report Number(s):
- CONF-950722--
- Journal Information:
- Advances in Cryogenic Engineering, Journal Name: Advances in Cryogenic Engineering Vol. 42B; ISSN 0065-2482; ISSN ACYEAC
- Country of Publication:
- United States
- Language:
- English
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