Effect of Additive Oxides with “Inert Pair” Elements on the Formation of the High-Tc Phase in the Superconductor of Bi-Sr-Ca-Cu-O System

Kentaro Ohhashi; Toshihiko Takai; Shigetoshi Tomio; Shigeharu Naka; Hideaki Itoh; Hitoshi Kitaguchi; Kiichi Oda; Jun Takada; Yoshinari Miura; Yasunori Ikeda; Mikio Takano

doi:10.2497/jjspm.36.474

Effect of Additive Oxides with “Inert Pair” Elements on the Formation of the High-Tc Phase in the Superconductor of Bi-Sr-Ca-Cu-O System

Kentaro Ohhashi, Toshihiko Takai, Shigetoshi Tomio, Shigeharu Naka, Hideaki Itoh, Hitoshi Kitaguchi, Kiichi Oda, Jun Takada, Yoshinari Miura, Yasunori Ikeda, Mikio Takano

Faculty of Engineering

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

Abstract

Specimens of M_2.2Sr_2.0Ca_2.0Cu_3.zO_y [M_2.2=Bi_1.8Pb_0.4-x In_x and Bi_1.8Pb_0.2M'_0.2 (M'=Sn, Sb and Y)] were sintered at 855°C for 40∼96hr after decarbonation in air atomosphere and their resistance-temperature curves were compared in order to investigate effects of “inert pair” elements on the formation of the high-T_c phase. In low level of In content (x-value) below 0.18, the stabilization of the high-T_c phase by incorporation of Pb remained almost unaffected. The step wise (shoulder-like) drop in resistance curves due to the coexistence of high and low-T_c phases was observed on specimens of In_0.2, Sn_0.2 and Sb_0.2, showing that lighter inert pair elements have poorer tendency to stabilize the high-T_c phase. The specimen of Y_0.2 showed disappearance of the high-T_c phase as well as in specimens of In_0.4 without Pb.

Original language	English
Pages (from-to)	474-477
Number of pages	4
Journal	Journal of the Japan Society of Powder and Powder Metallurgy
Volume	36
Issue number	5
DOIs	https://doi.org/10.2497/jjspm.36.474
Publication status	Published - 1989

ASJC Scopus subject areas

Mechanical Engineering
Industrial and Manufacturing Engineering
Metals and Alloys
Materials Chemistry

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10.2497/jjspm.36.474

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Ohhashi, K., Takai, T., Tomio, S., Naka, S., Itoh, H., Kitaguchi, H., Oda, K., Takada, J., Miura, Y., Ikeda, Y., & Takano, M. (1989). Effect of Additive Oxides with “Inert Pair” Elements on the Formation of the High-Tc Phase in the Superconductor of Bi-Sr-Ca-Cu-O System. Journal of the Japan Society of Powder and Powder Metallurgy, 36(5), 474-477. https://doi.org/10.2497/jjspm.36.474

Effect of Additive Oxides with “Inert Pair” Elements on the Formation of the High-Tc Phase in the Superconductor of Bi-Sr-Ca-Cu-O System. / Ohhashi, Kentaro; Takai, Toshihiko; Tomio, Shigetoshi et al.
In: Journal of the Japan Society of Powder and Powder Metallurgy, Vol. 36, No. 5, 1989, p. 474-477.

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

Ohhashi, K, Takai, T, Tomio, S, Naka, S, Itoh, H, Kitaguchi, H, Oda, K, Takada, J, Miura, Y, Ikeda, Y & Takano, M 1989, 'Effect of Additive Oxides with “Inert Pair” Elements on the Formation of the High-Tc Phase in the Superconductor of Bi-Sr-Ca-Cu-O System', Journal of the Japan Society of Powder and Powder Metallurgy, vol. 36, no. 5, pp. 474-477. https://doi.org/10.2497/jjspm.36.474

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abstract = "Specimens of M2.2Sr2.0Ca2.0Cu3.zOy [M2.2=Bi1.8Pb0.4-x Inx and Bi1.8Pb0.2M'0.2 (M'=Sn, Sb and Y)] were sintered at 855°C for 40∼96hr after decarbonation in air atomosphere and their resistance-temperature curves were compared in order to investigate effects of “inert pair” elements on the formation of the high-Tc phase. In low level of In content (x-value) below 0.18, the stabilization of the high-Tc phase by incorporation of Pb remained almost unaffected. The step wise (shoulder-like) drop in resistance curves due to the coexistence of high and low-Tc phases was observed on specimens of In0.2, Sn0.2 and Sb0.2, showing that lighter inert pair elements have poorer tendency to stabilize the high-Tc phase. The specimen of Y0.2 showed disappearance of the high-Tc phase as well as in specimens of In0.4 without Pb.",

author = "Kentaro Ohhashi and Toshihiko Takai and Shigetoshi Tomio and Shigeharu Naka and Hideaki Itoh and Hitoshi Kitaguchi and Kiichi Oda and Jun Takada and Yoshinari Miura and Yasunori Ikeda and Mikio Takano",

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AU - Ohhashi, Kentaro

AU - Takai, Toshihiko

AU - Tomio, Shigetoshi

AU - Naka, Shigeharu

AU - Itoh, Hideaki

AU - Kitaguchi, Hitoshi

AU - Oda, Kiichi

AU - Takada, Jun

AU - Miura, Yoshinari

AU - Ikeda, Yasunori

AU - Takano, Mikio

PY - 1989

Y1 - 1989

N2 - Specimens of M2.2Sr2.0Ca2.0Cu3.zOy [M2.2=Bi1.8Pb0.4-x Inx and Bi1.8Pb0.2M'0.2 (M'=Sn, Sb and Y)] were sintered at 855°C for 40∼96hr after decarbonation in air atomosphere and their resistance-temperature curves were compared in order to investigate effects of “inert pair” elements on the formation of the high-Tc phase. In low level of In content (x-value) below 0.18, the stabilization of the high-Tc phase by incorporation of Pb remained almost unaffected. The step wise (shoulder-like) drop in resistance curves due to the coexistence of high and low-Tc phases was observed on specimens of In0.2, Sn0.2 and Sb0.2, showing that lighter inert pair elements have poorer tendency to stabilize the high-Tc phase. The specimen of Y0.2 showed disappearance of the high-Tc phase as well as in specimens of In0.4 without Pb.

AB - Specimens of M2.2Sr2.0Ca2.0Cu3.zOy [M2.2=Bi1.8Pb0.4-x Inx and Bi1.8Pb0.2M'0.2 (M'=Sn, Sb and Y)] were sintered at 855°C for 40∼96hr after decarbonation in air atomosphere and their resistance-temperature curves were compared in order to investigate effects of “inert pair” elements on the formation of the high-Tc phase. In low level of In content (x-value) below 0.18, the stabilization of the high-Tc phase by incorporation of Pb remained almost unaffected. The step wise (shoulder-like) drop in resistance curves due to the coexistence of high and low-Tc phases was observed on specimens of In0.2, Sn0.2 and Sb0.2, showing that lighter inert pair elements have poorer tendency to stabilize the high-Tc phase. The specimen of Y0.2 showed disappearance of the high-Tc phase as well as in specimens of In0.4 without Pb.

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Effect of Additive Oxides with “Inert Pair” Elements on the Formation of the High-Tc Phase in the Superconductor of Bi-Sr-Ca-Cu-O System

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