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Engineered flux pinning centres in Pb-doped high temperature superconducting “Bi2Sr2CaCu2O8” ceramics

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Abstract

The Pb solubility of “Bi2Sr2CaCu2O8” is determined within the concentration range Bi2.18-xPbxSr2CaCu8+d with 0 ≤x ≤0.6 and the temperature range from 800 to 900°C. From a consideration of the Pb solubility in “Bi2Sr2CaCu2O8” a simple annealing procedure was developed to precipitate (Pb,Bi)4(Sr,Ca)5Cu010+d (451 phase) in high-temperature superconducting Pb-rich “Bi2Sr2CaCu2O8” ceramics. The precipitation results in a two-fold increase of the critical current density which is believed to express improved pinning properties of the superconducting ceramics. The microstructures of the samples with increased critical current density were studied with respect to the grain size and volume content of the 451 phase.

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Authors and Affiliations

  1. Max-Planck-Institut für Metallforschung, Heisenbergstr. 5, 70569, Stuttgart, Germany

    P. Majewski, H. -L. Su & F. Aldinger

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  1. P. Majewski
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  2. H. -L. Su
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  3. F. Aldinger
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Majewski, P., Su, H.L. & Aldinger, F. Engineered flux pinning centres in Pb-doped high temperature superconducting “Bi2Sr2CaCu2O8” ceramics. JOURNAL OF MATERIALS SCIENCE 31, 2035–2042 (1996). https://doi.org/10.1007/BF00356623

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