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Performance enhancement in high-T c ceramics through melting by Joule heating, infrared lamps, and laser radiation

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Abstract

We have analyzed experimental data on the effect of short-term melting followed by recrystallization on the microstructure and critical current density of YBa2Cu3O7 − x , Bi2Sr2CaCu2O8 − x , and Bi2Sr2Ca2Cu3O10 − x high-T c ceramics. The ceramics were melted using different heat sources: infrared lamps, laser radiation, and electric current. A significant increase in the critical current density of Bi2Sr2Ca2Cu3O10 − x ceramics (by a factor of 40 at 20 K and by a factor of 8 at 77 K) was achieved using cw CO2 laser irradiation. Melting TiC-doped (0.1%) Bi2Sr2Ca2Cu3O10 − x ceramics with a CO2 laser, followed by annealing, insured an even larger increase in critical current density: by a factor of 35 at 77 K. We have calculated the thickness of the molten layer produced by laser heating of high-T c ceramics.

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Authors and Affiliations

  1. Prokhorov General Physics Institute, Russian Academy of Sciences, ul. Vavilova 38, Moscow, 119333, Russia

    G. N. Mikhailova, V. N. Tokarev, A. V. Troitskii & V. M. Marchenko

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

    B. P. Mikhailov

Authors
  1. G. N. Mikhailova
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  2. B. P. Mikhailov
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  3. V. N. Tokarev
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  4. A. V. Troitskii
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  5. V. M. Marchenko
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Original Russian Text © G.N. Mikhailova, B.P. Mikhailov, V.N. Tokarev, A.V. Troitskii, V.M. Marchenko, 2007, published in Neorganicheskie Materialy, 2007, Vol. 43, No. 5, pp. 632–638.

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Mikhailova, G.N., Mikhailov, B.P., Tokarev, V.N. et al. Performance enhancement in high-T c ceramics through melting by Joule heating, infrared lamps, and laser radiation. Inorg Mater 43, 557–563 (2007). https://doi.org/10.1134/S0020168507050214

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  • DOI: https://doi.org/10.1134/S0020168507050214

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