Effect of oxygen partial pressure on the composition and structure of GdBa2Cu3O7-δ by solid state reaction

R. Tu, W. Ke, S. Zhang, T. Wang, L. M. Zhang, T. Goto

Research output: Contribution to journalArticle

Abstract

GdBa2Cu3O7-δ (GdBCO or Gd123) ceramics have been successfully prepared at oxygen partial pressure (PO2) of 0.02-0.10 MPa via solid state reaction method by using Gd2O3, BaCO3 and CuO powders as raw materials, whereas GdBa2Cu3O7-δ decomposed to Gd2BaCuO5 (Gd211), Gd2O3 and barium copper oxides owing to the instability of GdBa2Cu3O7-δ at PO2 = 0 MPa according to the stability phase diagram of GdBa2Cu3O7-δ. Effect of PO2 on the phase structure and microstructure of GdBa2Cu3O7-δ has been investigated by X-ray diffractometer and fieldemission scanning electron microscopy methods. Composition and microstructure of pellets sintered at PO2 = 0 MPa were totally different from pellets sintered at PO2 ≥ 0.02 MPa.

Original languageEnglish
Pages (from-to)21-25
Number of pages5
JournalMaterials Research Innovations
Volume19
DOIs
Publication statusPublished - 2015 Dec

Keywords

  • GdBaCuO
  • Oxygen partial pressure (P)
  • Sintering atmosphere
  • Stability phase diagram

ASJC Scopus subject areas

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

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