Influence of Calcining Temperature on Formation of the High-Tc Phase in the Bi-Pb-Sr-Ca-Cu-O System

Jun Takada; Toshio Egi; Kiichi Oda; Hitoshi Kitaguchi; Akiyoshi Osaka; Yoshinari Miura; Hiroyuki Ito; Yasunori Ikeda; Mikio Takano

doi:10.2497/jjspm.37.54

Influence of Calcining Temperature on Formation of the High-Tc Phase in the Bi-Pb-Sr-Ca-Cu-O System

Jun Takada, Toshio Egi, Kiichi Oda, Hitoshi Kitaguchi, Akiyoshi Osaka, Yoshinari Miura, Hiroyuki Ito, Yasunori Ikeda, Mikio Takano

Faculty of Engineering

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2 Citations (Scopus)

Abstract

The influence of the calcining temperature on the formation of the high-Tc phase and the electrical conductivity has been studied for the sample with a nominal composition of Bi_0.96Pbg_0.24Sr_1.0Ca_1.6O_x. the product in the sample calcined at 680°C was much different from that in the sample calcined at 800°C. Namely, Bi_0.46Ca_0.54-ySry_1.1O_x(0.1<y<0.2), Bi₁₀Ca₇O₂₂, Ca₂PbO₄, SrCO₃ and CuO were formed at 680°C, while the low-Tc phase and Ca₂PbO₄ were mainly formed at 800°C. At 850°C, the fraction of the high-Tc phase increased more quickly in the sample calcined at 680°C than in the sample calcined at 800°C, and mostly monophasic high-Tc phase was obtained by the sintering at 850°C for 24h after the calcination at 680°C, however, that sample showed lower Tc_(zero)=87K than the sample calcined at 800°C.

Original language	English
Pages (from-to)	54-59
Number of pages	6
Journal	Journal of the Japan Society of Powder and Powder Metallurgy
Volume	37
Issue number	1
DOIs	https://doi.org/10.2497/jjspm.37.54
Publication status	Published - 1990

ASJC Scopus subject areas

Mechanical Engineering
Industrial and Manufacturing Engineering
Metals and Alloys
Materials Chemistry

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Influence of Calcining Temperature on Formation of the High-Tc Phase in the Bi-Pb-Sr-Ca-Cu-O System. / Takada, Jun; Egi, Toshio; Oda, Kiichi; Kitaguchi, Hitoshi; Osaka, Akiyoshi; Miura, Yoshinari; Ito, Hiroyuki; Ikeda, Yasunori; Takano, Mikio.

In: Journal of the Japan Society of Powder and Powder Metallurgy, Vol. 37, No. 1, 1990, p. 54-59.

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

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abstract = "The influence of the calcining temperature on the formation of the high-Tc phase and the electrical conductivity has been studied for the sample with a nominal composition of Bi0.96Pbg0.24Sr1.0Ca1.6Ox. the product in the sample calcined at 680°C was much different from that in the sample calcined at 800°C. Namely, Bi0.46Ca0.54-ySry1.1Ox(0.110Ca7O22, Ca2PbO4, SrCO3 and CuO were formed at 680°C, while the low-Tc phase and Ca2PbO4 were mainly formed at 800°C. At 850°C, the fraction of the high-Tc phase increased more quickly in the sample calcined at 680°C than in the sample calcined at 800°C, and mostly monophasic high-Tc phase was obtained by the sintering at 850°C for 24h after the calcination at 680°C, however, that sample showed lower Tc(zero)=87K than the sample calcined at 800°C.",

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AU - Ito, Hiroyuki

AU - Ikeda, Yasunori

AU - Takano, Mikio

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AB - The influence of the calcining temperature on the formation of the high-Tc phase and the electrical conductivity has been studied for the sample with a nominal composition of Bi0.96Pbg0.24Sr1.0Ca1.6Ox. the product in the sample calcined at 680°C was much different from that in the sample calcined at 800°C. Namely, Bi0.46Ca0.54-ySry1.1Ox(0.110Ca7O22, Ca2PbO4, SrCO3 and CuO were formed at 680°C, while the low-Tc phase and Ca2PbO4 were mainly formed at 800°C. At 850°C, the fraction of the high-Tc phase increased more quickly in the sample calcined at 680°C than in the sample calcined at 800°C, and mostly monophasic high-Tc phase was obtained by the sintering at 850°C for 24h after the calcination at 680°C, however, that sample showed lower Tc(zero)=87K than the sample calcined at 800°C.

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Influence of Calcining Temperature on Formation of the High-Tc Phase in the Bi-Pb-Sr-Ca-Cu-O System

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