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- Kusano Yoshihiro
- Faculty of Engineering, Okayama University of Science
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- Yamaguchi Kazuhiro
- Faculty of Engineering, Okayama University of Science
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- Fukuhara Minoru
- Faculty of Engineering, Okayama University of Science
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- Doi Akira
- Faculty of Engineering, Okayama University of Science
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- Takada Toshio
- Faculty of Engineering, Okayama University of Science
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- Fujiwara Masashi
- Faculty of Engineering, Okayama University
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- Takada Jun
- Faculty of Engineering, Okayama University
Bibliographic Information
- Other Title
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- Bi‐Pb‐Sr‐Ca‐Cu‐O系高温相へのBa添加効果 (V)
- Bi Pb Sr Ca Cu Oケイ コウオンソウ エ ノ Ba テンカ コウ
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Abstract
The effects of cooling condition and Ba addition time on Tc of high-Tc phase in the Bi-Pb-Sr-Ca-Cu-O system were studied. X-ray diffraction and DC resistance measurements were carried out to observe phase identification and Tc values for a series of samples with compositions of Bi:Pb:Sr:Ba:Ca:Cu=0.9:0.2:1.0:X:1.0:1.6(X=0-0.05). When a mixture of BaCO3 and synthesized high-Tc phase was heated at 850°C for 60h in air, only a solid solution of high-Tc phase was formed in a quenched sample. However, in a sample cooled down slowly, Bi3(Sr, Ba)4Ca3Oz was found as an impurity phase in addition to the solid solution of high-Tc phase. Mixtures of BaCO3 (X=0.04) and the rest of metal oxides or metal carbonates were heated at 845°C 96h in air. Bi3(Sr, Ba)4Ca3Oz was also found in addition to the high-Tc phase in a quenched sample. When BaCO3 was added to the synthesized high-Tc phase, Tc(R=0) was 119K for the heated samples. When BaCO3 was added in starting materials, Tc decreased to 110K due to the formation of Bi3(Sr, Ba)4Ca3OZ.
Journal
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- Journal of the Japan Society of Powder and Powder Metallurgy
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Journal of the Japan Society of Powder and Powder Metallurgy 39 (5), 374-377, 1992
Japan Society of Powder and Powder Metallurgy
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Keywords
Details 詳細情報について
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- CRID
- 1390282681281383552
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- NII Article ID
- 130000818168
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- NII Book ID
- AN00222724
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- ISSN
- 18809014
- 05328799
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- NDL BIB ID
- 3769700
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed