Microstructural study of the Y-Ba-Cu-O system at high temperatures

Masato Murakami, Mitsuru Morita, Kenji Doi, Katsuyoshi Miyamoto, Hiroki Hamada

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65 Citations (Scopus)


Phase relations for the Y-Ba-Cu-O system near 1:2:3 stoichiometric compositions at high temperatures have been studied through microstructural observation. It has been found that YBa2Cu3Ox decomposes into a Y2BaCuO5(211) plus liquid (a mixture of BaCuO2 and CuO) phase at around 1050°C and the 211 phase further decomposes into Y2O3 plus liquid at around 1200°C. Even at 1500°C Y2O3 seems to be stable. On cooling Y2O3 reacts with the liquid to produce the 211 phase by peritectic solidification. At around 1000°C the 211 phase reacts with the liquid to produce the YBa2Cu3Ox phase again by the peritectic reaction.

Original languageEnglish
Pages (from-to)L399-L401
JournalJapanese Journal of Applied Physics
Issue number3 A
Publication statusPublished - 1989 Mar
Externally publishedYes


  • BaCu0
  • CuO
  • High temperature
  • Microstructure
  • Peritectic reaction
  • Phase relations
  • Y0
  • YBaCu0
  • YBaCuO

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)


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