Formation and electrical property of a high-Tc phase Bi,Pb-Sr-Ca-Cu-O superconductor

Jun Takada, Toshio Egi, Hitoshi Kitaguchi, Kiichi Oda, Akiyoshi Osaka, Yoshinari Miura, Yasunori Ikeda, Mikio Takano, Yoichi Tomii, Yoshio Oka, Naoichi Yamamoto

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The influence of sintering time on the formation of high-Tc phase and electrical conductivity has been studied for Bi:Pb:Sr:Ca:Cu=0.96:0.24:1.0:1.1:1.6. The volume ratio of the high-Tc phase to the superconductive phases was approximately 85% by heat treatment at 850°C for 48h, while the almost single high-Tc phase was obtained by repeating sintering procedures. The high-Tc phase particles were grown to about 10μ2m in width for 48h; after then the particle size remained almost constant. This tendency corresponds to the change in volume ratio of the high-Tc phase by heat treatment. As sintering time was extended, Pb content decreased. The sample heat treated at 850°C for 200h had only 6% of its initial Pb content. The electrical resistance dropped to zero at 110K within the experimental limit of 10-6ohm in the sample heat treated at 850°C for 150h in air. However, samples heat treated for 200h or more showed tailing in the R-T curves.

Original languageEnglish
Pages (from-to)527-532
Number of pages6
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume36
Issue number5
Publication statusPublished - Jul 1989
Externally publishedYes

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Superconducting materials
Electric properties
Sintering
Heat treatment
Acoustic impedance
Tailings
Particle size
Air
Hot Temperature
Electric Conductivity

ASJC Scopus subject areas

  • Mechanical Engineering
  • Metals and Alloys

Cite this

Formation and electrical property of a high-Tc phase Bi,Pb-Sr-Ca-Cu-O superconductor. / Takada, Jun; Egi, Toshio; Kitaguchi, Hitoshi; Oda, Kiichi; Osaka, Akiyoshi; Miura, Yoshinari; Ikeda, Yasunori; Takano, Mikio; Tomii, Yoichi; Oka, Yoshio; Yamamoto, Naoichi.

In: Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy, Vol. 36, No. 5, 07.1989, p. 527-532.

Research output: Contribution to journalArticle

Takada, J, Egi, T, Kitaguchi, H, Oda, K, Osaka, A, Miura, Y, Ikeda, Y, Takano, M, Tomii, Y, Oka, Y & Yamamoto, N 1989, 'Formation and electrical property of a high-Tc phase Bi,Pb-Sr-Ca-Cu-O superconductor', Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy, vol. 36, no. 5, pp. 527-532.
Takada, Jun ; Egi, Toshio ; Kitaguchi, Hitoshi ; Oda, Kiichi ; Osaka, Akiyoshi ; Miura, Yoshinari ; Ikeda, Yasunori ; Takano, Mikio ; Tomii, Yoichi ; Oka, Yoshio ; Yamamoto, Naoichi. / Formation and electrical property of a high-Tc phase Bi,Pb-Sr-Ca-Cu-O superconductor. In: Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy. 1989 ; Vol. 36, No. 5. pp. 527-532.
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