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Effect of TaC Microadditions on the Microstructure and Properties of (Bi,Pb)2Sr2Ca2Cu3O10 + x Superconducting Ceramics

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Inorganic Materials Aims and scope

Abstract

Information-theoretical approaches are used to assess the effect of nanocrystalline TaC microadditions on the thermodynamic conditions of microstructure evolution in (Bi,Pb)2Sr2Ca2Cu3O10 + x superconducting ceramics. Optimization analysis of property–structure–composition relationships indicates that the introduction of TaC makes it possible to raise the midpoint transition temperature T c of the ceramics by 4 K and their 77-K critical current density j c by 1000 A/cm2 . It is shown using information interpretation of multifractal formalism that the optimal TaC content is about 0.14 wt %. At this doping level, the expected increase in T c is 8 K, and that in j c is 1300 A/cm2 . The crystallite and pore substructures in Bi-2223 ceramics are shown to be correlated.

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Authors and Affiliations

  1. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Leninskii pr. 49, Moscow, 119991, Russia

    A. G. Kolmakov, B. P. Mikhailov, A. V. Loskutov & N. V. Glebova

  2. Moscow State University, Moscow, 119992, Russia

    P. E. Kazin

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  1. A. G. Kolmakov
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  2. B. P. Mikhailov
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  3. P. E. Kazin
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  4. A. V. Loskutov
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  5. N. V. Glebova
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Kolmakov, A.G., Mikhailov, B.P., Kazin, P.E. et al. Effect of TaC Microadditions on the Microstructure and Properties of (Bi,Pb)2Sr2Ca2Cu3O10 + x Superconducting Ceramics. Inorganic Materials 40, 764–774 (2004). https://doi.org/10.1023/B:INMA.0000034779.22408.47

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