The Formation Process of the High-Tc Phase in the Bi-Pb-Sr-Ca-Cu-O System

Hiroyuki Ito, Yasunori Ikeda, Zenji Hiroi, Mikio Takano, Yoshichika Bando, Jun Takada, Toshio Egi, Hitoshi Kitaguchi, Kiichi Oda

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2 Citations (Scopus)


The formation process of the 37Å (high-Tc) phase in the Bi-Pb-Sr-Ca -Cu-O system has been studied for a nominal composition Bi:Pb:Sr:Ca:Cu=0.9: 0.2:1:1:1.6. From this composition we obtained the high-Tc phase crystallizing homogeneously in the Pb-induced modulation mode as reported previously. The solid phases formed after each firing treatment at above 795°C were identified, and the melting points of various combinations of these were measured. As a result, the lowest liquid formation temperature was found to be 825°C for a combination of the 24Å phase and Ca2PbO4. The liquid formation and formation of the Pb-substituted 30Å phase seems to be the initial step the formation of the 37Å phase.

Original languageEnglish
Pages (from-to)743-746
Number of pages4
JournalJournal of the Japan Society of Powder and Powder Metallurgy
Issue number5
Publication statusPublished - 1990

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry


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