Magnetic, electrical, and microstructural properties of YBa2 Cu3 O7: A comparison of sol-gel, co-precipitated, and solid state processing routes

E. A. Hayri, M. Greenblatt, K. V. Ramanujachary, M. Nagano, J. Oliver, M. J. Miceli, R. Gerhardt

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Abstract

Samples of YBa2 Cu3 O7 were prepared by sol-gel, co-precipitation, and solid state processes. Sol-gel samples were prepared from a solution of yttrium, barium, and copper nitrates dissolved in ethylene glycol, co-precipitated samples were made by the amorphous citrate method, and solid state samples were prepared by conventional high temperature reaction of the appropriate metal oxides and carbonates. The sol-gel process was shown to yield superconducting samples of superior Meissner effect, critical current, and critical field. The co-precipitated samples contain impurities that affect the critical properties. The sol-gel and co-precipitated processes yield materials with well-formed, plate-like particles with a fairly uniform size of about 10 μm. The grains in the solid state sample are smaller but have a much wider distribution of sizes than the samples prepared by solution methods.

Original languageEnglish (US)
Pages (from-to)1099-1102
Number of pages4
JournalJournal of Materials Research
Volume4
Issue number5
DOIs
StatePublished - Oct 1989

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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