Preparation of Bi-Pb-Sr-Ca-Cu-O High-Tc Superconductor from Coprecipitated Oxalates

Kiichi Oda; Hitoshi Kitaguchi; Jun Takada; Akiyoshi Osaka; Yoshinari Miura; Yasunori Ikeda; Mikio Takano; Yoshichika Bando; Yoichi Tomii; Yoshio Oka; Naoichi Yamamoto; Yasuo Takeda; Hiromasa Mazaki

doi:10.2497/jjspm.35.959

Kiichi Oda, Hitoshi Kitaguchi, Jun Takada, Akiyoshi Osaka, Yoshinari Miura, Yasunori Ikeda, Mikio Takano, Yoshichika Bando, Yoichi Tomii, Yoshio Oka, Naoichi Yamamoto, Yasuo Takeda, Hiromasa Mazaki

Author information

Kiichi Oda
[in Japanese]
Hitoshi Kitaguchi
[in Japanese]
Jun Takada
[in Japanese]
Akiyoshi Osaka
[in Japanese]
Yoshinari Miura
[in Japanese]
Yasunori Ikeda
[in Japanese]
Mikio Takano
[in Japanese]
Yoshichika Bando
[in Japanese]
Yoichi Tomii
[in Japanese]
Yoshio Oka
[in Japanese]
Naoichi Yamamoto
[in Japanese]
Yasuo Takeda
[in Japanese]
Hiromasa Mazaki
[in Japanese]

JOURNAL OPEN ACCESS

1988 Volume 35 Issue 9 Pages 959-964

DOI https://doi.org/10.2497/jjspm.35.959

Details

Abstract

In order to prepare the single high-Tc phase in the Bi-Pb-Sr-Ca-Cu-O system, the chemical compositions and the heat treatment conditions were examined. The addition of the excess amount of calcium and the two-step heat treatment were more effective to promote the formation of the high-Tc phase and to shorten the heat treatment time. The sample with the nominal composition of Bi_0.96Pb_0.24Sr_1.0Ca_1.1Cu_1.6O_xheat treated at 850°C for 24h-70h was mostly composed of high-Tc phase. The content of Pb in the sample was considerably decreased by the heat treatment and reduced to 1/2-1/3 of its initial value.

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