Chemical and Mechanical Stability of the High-Tc Phase in the Bi-Pb-Sr-Ca-Cu-O System (I) Effects of Heat Treatment of Crushed Powder of the High-Tc Phase

Jun Takada; Katsunori Hosotani; Masashi Fujiwara; Yoshihiro Kusano; Tokuro Nanba; Yasunori Ikeda; Mikio Takano

doi:10.2497/jjspm.39.779

Chemical and Mechanical Stability of the High-Tc Phase in the Bi-Pb-Sr-Ca-Cu-O System (I) Effects of Heat Treatment of Crushed Powder of the High-Tc Phase

Jun Takada, Katsunori Hosotani, Masashi Fujiwara, Yoshihiro Kusano, Tokuro Nanba, Yasunori Ikeda, Mikio Takano

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

Abstract

Chemical and mechanical stability of the high-Tc phase has been studied for the samples of Bi_0.9Pb_0.2Sr_1.0Ca_1.0Cu_1.6O_x. Mechanical grinding converts the high-Tc phase into a nonsuperconducting amorphous phase. The ground high-Tc phase is not stabilized on annealing at lower temperatures below820»C. Annealing at lower temperature leads to precipitation of some impurity phases and the low-Tc phase which depends on annealing temperature and time. The high-Tc phase is recovered by annealing at 850»C. The lattice parameters a and c of the high-Tc phase annealed at 850»C are longer than those below 820»C.

Original language	English
Pages (from-to)	779-782
Number of pages	4
Journal	Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume	39
Issue number	9
DOIs	https://doi.org/10.2497/jjspm.39.779
Publication status	Published - 1992

ASJC Scopus subject areas

Mechanical Engineering
Industrial and Manufacturing Engineering
Metals and Alloys
Materials Chemistry

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Takada, J., Hosotani, K., Fujiwara, M., Kusano, Y., Nanba, T., Ikeda, Y., & Takano, M. (1992). Chemical and Mechanical Stability of the High-Tc Phase in the Bi-Pb-Sr-Ca-Cu-O System (I) Effects of Heat Treatment of Crushed Powder of the High-Tc Phase. Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy, 39(9), 779-782. https://doi.org/10.2497/jjspm.39.779

Chemical and Mechanical Stability of the High-Tc Phase in the Bi-Pb-Sr-Ca-Cu-O System (I) Effects of Heat Treatment of Crushed Powder of the High-Tc Phase. / Takada, Jun; Hosotani, Katsunori; Fujiwara, Masashi et al.

In: Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy, Vol. 39, No. 9, 1992, p. 779-782.

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

Takada, J, Hosotani, K, Fujiwara, M, Kusano, Y, Nanba, T, Ikeda, Y & Takano, M 1992, 'Chemical and Mechanical Stability of the High-Tc Phase in the Bi-Pb-Sr-Ca-Cu-O System (I) Effects of Heat Treatment of Crushed Powder of the High-Tc Phase', Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy, vol. 39, no. 9, pp. 779-782. https://doi.org/10.2497/jjspm.39.779

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abstract = "Chemical and mechanical stability of the high-Tc phase has been studied for the samples of Bi0.9Pb0.2Sr1.0Ca1.0Cu1.6Ox. Mechanical grinding converts the high-Tc phase into a nonsuperconducting amorphous phase. The ground high-Tc phase is not stabilized on annealing at lower temperatures below820»C. Annealing at lower temperature leads to precipitation of some impurity phases and the low-Tc phase which depends on annealing temperature and time. The high-Tc phase is recovered by annealing at 850»C. The lattice parameters a and c of the high-Tc phase annealed at 850»C are longer than those below 820»C.",

author = "Jun Takada and Katsunori Hosotani and Masashi Fujiwara and Yoshihiro Kusano and Tokuro Nanba and Yasunori Ikeda and Mikio Takano",

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AU - Fujiwara, Masashi

AU - Kusano, Yoshihiro

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AU - Ikeda, Yasunori

AU - Takano, Mikio

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AB - Chemical and mechanical stability of the high-Tc phase has been studied for the samples of Bi0.9Pb0.2Sr1.0Ca1.0Cu1.6Ox. Mechanical grinding converts the high-Tc phase into a nonsuperconducting amorphous phase. The ground high-Tc phase is not stabilized on annealing at lower temperatures below820»C. Annealing at lower temperature leads to precipitation of some impurity phases and the low-Tc phase which depends on annealing temperature and time. The high-Tc phase is recovered by annealing at 850»C. The lattice parameters a and c of the high-Tc phase annealed at 850»C are longer than those below 820»C.

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Chemical and Mechanical Stability of the High-Tc Phase in the Bi-Pb-Sr-Ca-Cu-O System (I) Effects of Heat Treatment of Crushed Powder of the High-Tc Phase

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