Equilibrium phase diagram for the system PbO-CaO-CuO

Hitoshi Kitaguchi, Jun Takada, Kiichi Oda, Yoshinari Miura

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Abstract

In order to obtain information on the formation process of the high-T c phase in the Bi, Pb-Sr-Ca-Cu-O system, phase equilibria in 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(Cu 2O) and PbO(PbO 2)-CaO in air. Three invariant points were detected: a eutectic reaction (PbO + Ca 2PbO 4 = L) at 847 ± 6°C, a peritectic reaction (Ca 2PbO 4 = L + CaO) at 980 ± 2°C, and a eutectic reaction (PbO + CuO = L) at 789 ± 3°C. For PbO(PbO 2)-CaO-CuO, subsolidus phase equilibrium in air was established. The liquidus was also examined at 780, 800, and 820°C, and a ternary (PbO-Ca 2PbO 4-CuO) eutectic point was detected at 772 ± 6°C.

Original languageEnglish
Pages (from-to)929-931
Number of pages3
JournalJournal of Materials Research
Volume5
Issue number5
Publication statusPublished - May 1990

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eutectics
Eutectics
Phase diagrams
phase diagrams
Phase equilibria
air
liquidus
Air
Thermoanalysis
thermal analysis
x ray diffraction
Diffraction
diagrams
X rays
Chemical analysis
Temperature
temperature

ASJC Scopus subject areas

  • Materials Science(all)

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Kitaguchi, H., Takada, J., Oda, K., & Miura, Y. (1990). Equilibrium phase diagram for the system PbO-CaO-CuO. Journal of Materials Research, 5(5), 929-931.

Equilibrium phase diagram for the system PbO-CaO-CuO. / Kitaguchi, Hitoshi; Takada, Jun; Oda, Kiichi; Miura, Yoshinari.

In: Journal of Materials Research, Vol. 5, No. 5, 05.1990, p. 929-931.

Research output: Contribution to journalArticle

Kitaguchi, H, Takada, J, Oda, K & Miura, Y 1990, 'Equilibrium phase diagram for the system PbO-CaO-CuO', Journal of Materials Research, vol. 5, no. 5, pp. 929-931.
Kitaguchi H, Takada J, Oda K, Miura Y. Equilibrium phase diagram for the system PbO-CaO-CuO. Journal of Materials Research. 1990 May;5(5):929-931.
Kitaguchi, Hitoshi ; Takada, Jun ; Oda, Kiichi ; Miura, Yoshinari. / Equilibrium phase diagram for the system PbO-CaO-CuO. In: Journal of Materials Research. 1990 ; Vol. 5, No. 5. pp. 929-931.
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abstract = "In order to obtain information on the formation process of the high-T c phase in the Bi, Pb-Sr-Ca-Cu-O system, phase equilibria in 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(Cu 2O) and PbO(PbO 2)-CaO in air. Three invariant points were detected: a eutectic reaction (PbO + Ca 2PbO 4 = L) at 847 ± 6°C, a peritectic reaction (Ca 2PbO 4 = L + CaO) at 980 ± 2°C, and a eutectic reaction (PbO + CuO = L) at 789 ± 3°C. For PbO(PbO 2)-CaO-CuO, subsolidus phase equilibrium in air was established. The liquidus was also examined at 780, 800, and 820°C, and a ternary (PbO-Ca 2PbO 4-CuO) eutectic point was detected at 772 ± 6°C.",
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N2 - In order to obtain information on the formation process of the high-T c phase in the Bi, Pb-Sr-Ca-Cu-O system, phase equilibria in 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(Cu 2O) and PbO(PbO 2)-CaO in air. Three invariant points were detected: a eutectic reaction (PbO + Ca 2PbO 4 = L) at 847 ± 6°C, a peritectic reaction (Ca 2PbO 4 = L + CaO) at 980 ± 2°C, and a eutectic reaction (PbO + CuO = L) at 789 ± 3°C. For PbO(PbO 2)-CaO-CuO, subsolidus phase equilibrium in air was established. The liquidus was also examined at 780, 800, and 820°C, and a ternary (PbO-Ca 2PbO 4-CuO) eutectic point was detected at 772 ± 6°C.

AB - In order to obtain information on the formation process of the high-T c phase in the Bi, Pb-Sr-Ca-Cu-O system, phase equilibria in 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(Cu 2O) and PbO(PbO 2)-CaO in air. Three invariant points were detected: a eutectic reaction (PbO + Ca 2PbO 4 = L) at 847 ± 6°C, a peritectic reaction (Ca 2PbO 4 = L + CaO) at 980 ± 2°C, and a eutectic reaction (PbO + CuO = L) at 789 ± 3°C. For PbO(PbO 2)-CaO-CuO, subsolidus phase equilibrium in air was established. The liquidus was also examined at 780, 800, and 820°C, and a ternary (PbO-Ca 2PbO 4-CuO) eutectic point was detected at 772 ± 6°C.

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