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 language | English |
|---|---|
| Pages (from-to) | 527-532 |
| Number of pages | 6 |
| Journal | Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy |
| Volume | 36 |
| Issue number | 5 |
| Publication status | Published - Jul 1989 |
| Externally published | Yes |
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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 journal › Article
}
TY - JOUR
T1 - Formation and electrical property of a high-Tc phase Bi,Pb-Sr-Ca-Cu-O superconductor
AU - Takada, Jun
AU - Egi, Toshio
AU - Kitaguchi, Hitoshi
AU - Oda, Kiichi
AU - Osaka, Akiyoshi
AU - Miura, Yoshinari
AU - Ikeda, Yasunori
AU - Takano, Mikio
AU - Tomii, Yoichi
AU - Oka, Yoshio
AU - Yamamoto, Naoichi
PY - 1989/7
Y1 - 1989/7
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0024701741&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0024701741&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0024701741
VL - 36
SP - 527
EP - 532
JO - Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
JF - Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
SN - 0532-8799
IS - 5
ER -