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

doi:10.2497/jjspm.37.743

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

Faculty of Engineering

Research output: Contribution to journal › Article

2 Citations (Scopus)

Abstract

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 language	English
Pages (from-to)	743-746
Number of pages	4
Journal	Journal of the Japan Society of Powder and Powder Metallurgy
Volume	37
Issue number	5
DOIs	https://doi.org/10.2497/jjspm.37.743
Publication status	Published - Jan 1 1990

ASJC Scopus subject areas

Mechanical Engineering
Industrial and Manufacturing Engineering
Metals and Alloys
Materials Chemistry

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Ito, H., Ikeda, Y., Hiroi, Z., Takano, M., Bando, Y., Takada, J., Egi, T., Kitaguchi, H., & Oda, K. (1990). The Formation Process of the High-Tc Phase in the Bi-Pb-Sr-Ca-Cu-O System. Journal of the Japan Society of Powder and Powder Metallurgy, 37(5), 743-746. https://doi.org/10.2497/jjspm.37.743

The Formation Process of the High-Tc Phase in the Bi-Pb-Sr-Ca-Cu-O System. / Ito, Hiroyuki; Ikeda, Yasunori; Hiroi, Zenji; Takano, Mikio; Bando, Yoshichika; Takada, Jun; Egi, Toshio; Kitaguchi, Hitoshi; Oda, Kiichi.

In: Journal of the Japan Society of Powder and Powder Metallurgy, Vol. 37, No. 5, 01.01.1990, p. 743-746.

Research output: Contribution to journal › Article

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

abstract = "The formation process of the 37{\AA} (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 24{\AA} phase and Ca2PbO4. The liquid formation and formation of the Pb-substituted 30{\AA} phase seems to be the initial step the formation of the 37{\AA} phase.",

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AU - Bando, Yoshichika

AU - Takada, Jun

AU - Egi, Toshio

AU - Kitaguchi, Hitoshi

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