Abstract
Bulk (Bi,Pb)2Sr2Ca2Cu3Ox (Bi-2223) and Bi2Sr2CaCu2Ox (Bi-2212) superconductors were fabricated by sinter forging. Bi-2223 (≈90% Bi-2223, 10% (Bi,Pb)2Sr2CaCu2Ox + 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 ≈845°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 (Jc) values of 2000–8000 A/cm2; the Bi-2212 exhibited very low Jc. Extent of texture was evaluated by three X-ray diffraction methods: 2θ scans, rocking curves, and orientation distribution functions. It was found that Jc correlated best with the orientation distribution functions.
Work supported by the U.S. Department of Energy (DOE), Energy Efficiency and Renewable Energy, as part of a DOE program to develop electric power technology, and Basic Energy Sciences (Materials Sciences), under Contract W-31-109-Eng-38.
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Goretta, K.C., Chen, N., Biondo, A.C., Fisher, B.L., Lanagan, M.T., Kallend, J.S. (1996). Fabrication and Texture Characterization of Bulk (Bi,Pb)2Sr2Ca2Cu3Ox and Bi2Sr2CaCu2Ox Superconductors. In: Summers, L.T. (eds) Advances in Cryogenic Engineering Materials . Advances in Cryogenic Engineering Materials , vol 42. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-9059-7_98
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DOI: https://doi.org/10.1007/978-1-4757-9059-7_98
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