Solid state phase transformation of Nd1+xBa2-xCu3O6+∂ during annealing processing

Masateru Yoshizumi, Yuichi Nakamura, Teruo Izumi, Yuh Shiohara, Yuichi Ikuhara, Taketo Sakuma

Research output: Contribution to journalArticlepeer-review


In order to investigate solid state phase transformation in solid, Nd1+xBa2-xCu3O6+∂ powders with different compositions were annealed under different annealing conditions. The temperature-substitution ratio-oxygen content phase diagram of Nd1+xBa2-xCu3O6+∂ solid solution was constructed. The condition to occur Nd123ss phase separation was clarified by investigating the compositional fluctuation, XRD pattern, the time dependences of Tc properties and oxygen content. Solid state phase transformation of Nd123ss advances with two steps. Tetragonal orthorhombic phase transition due to oxygen introduction occurs at first, and then the orthorhombic phase with small x decomposes to the two phases by spinodal decomposition.

Original languageEnglish
Pages (from-to)139-142
Number of pages4
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Issue number3
Publication statusPublished - 2001
Externally publishedYes


  • NdBaCuO
  • Phase diagram
  • Phase separation
  • Solid solution

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry


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