Chemical and mechanical stability of the Ba-added high-Tc phase in the Bi-Pb-Sr-Ca-Cu-O system

Jun Takada, Kosei Fujisaka, Katsunori Hosotani, Toshio Egi, Yoshihiro Kusano, Tokuro Nanba, Yasunori Ikeda, Mikio Takano

Research output: Contribution to journalArticle

Abstract

Chemical and mechanical stability of the Ba-added high-Tc phase has been studied using XRD and DTA for samples of Bi0.9Pb0.2Sr1.0BaxCa1.0Cu1.6Oz with x = 0 and 0.05. Some impurities were observed in all samples after the heat treatment at 300 to approximately 820°C. BaPb0.75Bi0.25O3 was also formed in the Ba-added samples heated at 700 to approximately 800°C. These impurities were thought to be formed from the amorphous phase which was produced by mechanical grinding of the high-Tc phase. The impurities disappeared and an almost monophasic sample of the high-Tc phase was obtained by heating at 850°C. The lattice parameter c of the Ba-added high-Tc phase was longer than that of the Ba-free one above 800°C. The parameter c of the Ba-added sample heated at 850°C increased with an increase of heating time and was saturated over 48 h. The increase of c was due to the Ba dissolution in the high-Tc phase.

Original languageEnglish
Pages (from-to)204-207
Number of pages4
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume40
Issue number2
Publication statusPublished - Feb 1993

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Mechanical stability
Chemical stability
Impurities
Heating
Differential thermal analysis
Lattice constants
Dissolution
Heat treatment

ASJC Scopus subject areas

  • Mechanical Engineering
  • Metals and Alloys

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Chemical and mechanical stability of the Ba-added high-Tc phase in the Bi-Pb-Sr-Ca-Cu-O system. / Takada, Jun; Fujisaka, Kosei; Hosotani, Katsunori; Egi, Toshio; Kusano, Yoshihiro; Nanba, Tokuro; Ikeda, Yasunori; Takano, Mikio.

In: Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy, Vol. 40, No. 2, 02.1993, p. 204-207.

Research output: Contribution to journalArticle

Takada, Jun ; Fujisaka, Kosei ; Hosotani, Katsunori ; Egi, Toshio ; Kusano, Yoshihiro ; Nanba, Tokuro ; Ikeda, Yasunori ; Takano, Mikio. / Chemical and mechanical stability of the Ba-added high-Tc phase in the Bi-Pb-Sr-Ca-Cu-O system. In: Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy. 1993 ; Vol. 40, No. 2. pp. 204-207.
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AU - Egi, Toshio

AU - Kusano, Yoshihiro

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AU - Ikeda, Yasunori

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