Synthesis of highly pure bismuth-2223 by a two-powder process

S. E. Dorris, B. C. Prorok, Michael T. Lanagan, S. Sinha, R. B. Poeppel

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Abstract

Use of a so-called two-powder process results in rapid formation of a highly pure superconducting bismuth-2223 phase during powder-in-tube processing. In this process, SrχCa1-χCuO2 and Bi1.8Pb0.4Sr2-χCa1+χCu2O8 are formed as separate intermediate phases, and mixed, then processed together within a silver sheath. Mixtures with χ values of 0.0, 0.25, 0.50, 0.75, and 1.0 are studied in order to probe the relationship between 2223 formation and the melting behavior of 2212. The best results to date have been obtained with the χ=0.0 mixture containing high-melting, strontium-rich 2212 and calcium cuprate. The process is very reproducible and produces nearly pure 2223 in as little as 50 h.

Original languageEnglish (US)
Pages (from-to)66-74
Number of pages9
JournalPhysica C: Superconductivity and its applications
Volume212
Issue number1-2
DOIs
StatePublished - Jul 1 1993

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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