Effect of Ba addition to the High-Tc Phase in the Bi-Pb-Sr-Ca-Cu-O System (II)

Jun Takada; Kiichi Oda; Toshio Egi; Masashi Fujiwara; Hitoshi Kitaguchi; Yoshinari Miura; Hiromasa Mazaki; Yoichi Tomii; Yasunori Ikeda; Zenji Hiroi; Mikio Takano

doi:10.2497/jjspm.38.275

Effect of Ba addition to the High-Tc Phase in the Bi-Pb-Sr-Ca-Cu-O System (II)

Jun Takada, Kiichi Oda, Toshio Egi, Masashi Fujiwara, Hitoshi Kitaguchi, Yoshinari Miura, Hiromasa Mazaki, Yoichi Tomii, Yasunori Ikeda, Zenji Hiroi, Mikio Takano

Faculty of Engineering

Research output: Contribution to journal › Article › peer-review

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Abstract

The effects of Ba-addition to the high-Tc phase in the Bi-Pb-Sr-Ca-Cu-O system have been studied for starting compositions of Bi:Pb:(Sr_1−x, Ba_x): Ca:Cu=0.96:0.24:1.0:1.0:1.6 with x=0 to 0.30 heated at 845 or 850°C. The characterization of the samples has been made by XRD, DTA, the measurements of DC electrical resistivity and AC susceptibility, SEM and WDX. The Ba-addition in the range of 0.005≦x≦0.10 promotes the formation of the high-Tc phase due to lowering of the partial melt. Tc increases to 112K for the sample with low Ba contents, while Ba-free sample exhibits Tc=106K. The tetragonal lattice constants are a=5.412 Å for all samples, but c=37.10 Å and 37.20 Å for x=0 and 0.2, respectively. WDX experiments clearly reveals that the high-Tc phase contains a small amount of Ba as a solid solution.

Original language	English
Pages (from-to)	275-278
Number of pages	4
Journal	Journal of the Japan Society of Powder and Powder Metallurgy
Volume	38
Issue number	2
DOIs	https://doi.org/10.2497/jjspm.38.275
Publication status	Published - 1991

ASJC Scopus subject areas

Mechanical Engineering
Industrial and Manufacturing Engineering
Metals and Alloys
Materials Chemistry

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title = "Effect of Ba addition to the High-Tc Phase in the Bi-Pb-Sr-Ca-Cu-O System (II)",

abstract = "The effects of Ba-addition to the high-Tc phase in the Bi-Pb-Sr-Ca-Cu-O system have been studied for starting compositions of Bi:Pb:(Sr1−x, Bax): Ca:Cu=0.96:0.24:1.0:1.0:1.6 with x=0 to 0.30 heated at 845 or 850°C. The characterization of the samples has been made by XRD, DTA, the measurements of DC electrical resistivity and AC susceptibility, SEM and WDX. The Ba-addition in the range of 0.005≦x≦0.10 promotes the formation of the high-Tc phase due to lowering of the partial melt. Tc increases to 112K for the sample with low Ba contents, while Ba-free sample exhibits Tc=106K. The tetragonal lattice constants are a=5.412 {\AA} for all samples, but c=37.10 {\AA} and 37.20 {\AA} for x=0 and 0.2, respectively. WDX experiments clearly reveals that the high-Tc phase contains a small amount of Ba as a solid solution.",

author = "Jun Takada and Kiichi Oda and Toshio Egi and Masashi Fujiwara and Hitoshi Kitaguchi and Yoshinari Miura and Hiromasa Mazaki and Yoichi Tomii and Yasunori Ikeda and Zenji Hiroi and Mikio Takano",

year = "1991",

doi = "10.2497/jjspm.38.275",

language = "English",

volume = "38",

pages = "275--278",

journal = "Journal of the Japan Society of Powder and Powder Metallurgy",

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TY - JOUR

T1 - Effect of Ba addition to the High-Tc Phase in the Bi-Pb-Sr-Ca-Cu-O System (II)

AU - Takada, Jun

AU - Oda, Kiichi

AU - Egi, Toshio

AU - Fujiwara, Masashi

AU - Kitaguchi, Hitoshi

AU - Miura, Yoshinari

AU - Mazaki, Hiromasa

AU - Tomii, Yoichi

AU - Ikeda, Yasunori

AU - Hiroi, Zenji

AU - Takano, Mikio

PY - 1991

Y1 - 1991

N2 - The effects of Ba-addition to the high-Tc phase in the Bi-Pb-Sr-Ca-Cu-O system have been studied for starting compositions of Bi:Pb:(Sr1−x, Bax): Ca:Cu=0.96:0.24:1.0:1.0:1.6 with x=0 to 0.30 heated at 845 or 850°C. The characterization of the samples has been made by XRD, DTA, the measurements of DC electrical resistivity and AC susceptibility, SEM and WDX. The Ba-addition in the range of 0.005≦x≦0.10 promotes the formation of the high-Tc phase due to lowering of the partial melt. Tc increases to 112K for the sample with low Ba contents, while Ba-free sample exhibits Tc=106K. The tetragonal lattice constants are a=5.412 Å for all samples, but c=37.10 Å and 37.20 Å for x=0 and 0.2, respectively. WDX experiments clearly reveals that the high-Tc phase contains a small amount of Ba as a solid solution.

AB - The effects of Ba-addition to the high-Tc phase in the Bi-Pb-Sr-Ca-Cu-O system have been studied for starting compositions of Bi:Pb:(Sr1−x, Bax): Ca:Cu=0.96:0.24:1.0:1.0:1.6 with x=0 to 0.30 heated at 845 or 850°C. The characterization of the samples has been made by XRD, DTA, the measurements of DC electrical resistivity and AC susceptibility, SEM and WDX. The Ba-addition in the range of 0.005≦x≦0.10 promotes the formation of the high-Tc phase due to lowering of the partial melt. Tc increases to 112K for the sample with low Ba contents, while Ba-free sample exhibits Tc=106K. The tetragonal lattice constants are a=5.412 Å for all samples, but c=37.10 Å and 37.20 Å for x=0 and 0.2, respectively. WDX experiments clearly reveals that the high-Tc phase contains a small amount of Ba as a solid solution.

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Effect of Ba addition to the High-Tc Phase in the Bi-Pb-Sr-Ca-Cu-O System (II)

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