Equilibrium Phase Diagram For The System PbO-CaO-CuO

Hitoshi Kitaguchi, Jun Takada, Kiichi Oda, Yoshinari Miura

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45 Citations (Scopus)


In order to obtain essential information on the formation process of the high-Jc phase in the Bi, Pb-Sr-Ca-Cu-O system, phase equilibria in the system PbO-CaO-CuO have been studied, mainly by x-ray diffraction analysis and thermal analysis. Temperature versus composition diagrams were established for the systems PbO-CuO(Cu20) and PbO(Pb02)-CaO in air. Three invariant points were detected in these systems: a eutectic reaction (PbO + Ca2Pb04 = L) at 847 ± 6 °C, a peritectic reaction (Ca2Pb04 = L + CaO) at 980 ± 2 °C, and a eutectic reaction (PbO + CuO = L) at 789 ± 3 °C. For the system PbO(Pb02)-CaO-CuO, subsolidus phase equilibrium in air was established. The liquidus was also examined at 780, 800, and 820 °C, and a ternary (Pb0-Ca2Pb04-Cu0) eutectic point was detected at 772 ± 6 °C.

Original languageEnglish
Pages (from-to)929-931
Number of pages3
JournalJournal of Materials Research
Issue number5
Publication statusPublished - May 1990
Externally publishedYes

ASJC Scopus subject areas

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


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