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 › peer-review

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 - 1990

ASJC Scopus subject areas

Mechanical Engineering
Industrial and Manufacturing Engineering
Metals and Alloys
Materials Chemistry

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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.",

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

year = "1990",

doi = "10.2497/jjspm.37.743",

language = "English",

volume = "37",

pages = "743--746",

journal = "Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy",

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TY - JOUR

T1 - The Formation Process of the High-Tc Phase in the Bi-Pb-Sr-Ca-Cu-O System

AU - Ito, Hiroyuki

AU - Ikeda, Yasunori

AU - Hiroi, Zenji

AU - Takano, Mikio

AU - Bando, Yoshichika

AU - Takada, Jun

AU - Egi, Toshio

AU - Kitaguchi, Hitoshi

AU - Oda, Kiichi

PY - 1990

Y1 - 1990

N2 - 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.

AB - 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.

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JO - Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy

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SN - 0532-8799

IS - 5

ER -

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

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