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The study of microstructure of Bi, Pb-Sr-Ca-Cu-O superconductors prepared by multiple intermediate processing

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Abstract

The influence of a multistep intermediate pressing and sintering process on microstructure and the relation between microstructure and values of critical current density, J c, in Bi, Pb-Sr-Ca-Cu-O high-T c polycrystalline superconductors was studied. The J c values increased with increasing number of pressing and sintering steps, n, only up to a certain value of n. The increase of J c was reached by improvement of connections between grains due to compacting and by the alignment of superconducting grains in the c-axis direction. The maximal value of J c was found for n = 5. The crack development is responsible for decreasing J c for a higher number of steps.

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Authors and Affiliations

  1. Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 043 53, Košice, Slovakia

    N. Hudáková

  2. Institute of Physics, Academy of Sciences of Czech Republic, Cukrovarnícka 10, 16 200, Praha 6, Czech Republic

    V. Plecháček & K. KníŽek

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  1. N. Hudáková
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  2. V. Plecháček
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  3. K. KníŽek
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Hudáková, N., Plecháček, V. & KníŽek, K. The study of microstructure of Bi, Pb-Sr-Ca-Cu-O superconductors prepared by multiple intermediate processing. JOURNAL OF MATERIALS SCIENCE 30, 3607–3611 (1995). https://doi.org/10.1007/BF00351873

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  • DOI: https://doi.org/10.1007/BF00351873

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