Effect of Li-addition to the High-Tc Phase in the Bi-Pb-Sr-Ca-Cu-O System. (II).

DOI Web Site 2 Citations
  • Takada Jun
    Department of Applied Chemistry, Faculty of Engineering, Okayama University
  • Fujiwara Masashi
    Department of Applied Chemistry, Faculty of Engineering, Okayama University
  • Egi Toshio
    Department of Applied Chemistry, Faculty of Engineering, Okayama University Superconducting and Cryogenic Technology Center, Kobe Steel, Ltd.
  • Nanba Tokuro
    Department of Applied Chemistry, Faculty of Engineering, Okayama University
  • Ikeda Yasunori
    Institute for Chemical Research, Kyoto University
  • Takano Mikio
    Institute for Chemical Research, Kyoto University
  • Mazaki Hiromasa
    Department of Mathematics and Physics, The National Defence Academy

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Other Title
  • Ｂｉ‐Ｐｂ‐Ｓｒ‐Ｃａ‐Ｃｕ‐Ｏ系高温相へのＬｉ添加効果　（第ＩＩ報）
  • Bi Pb Sr Ca Cu Oケイ コウオンソウ エ ノ Li テンカ コウ

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Abstract

The effects of Li-addition to the high-Tc phase in Bi-Pb-Sr-Ca-Cu-O system have been studied for the samples with the nominal composition of Bi:Pb:Sr:Ca:(Cu, Li)=0.96:0.24:1.0:1.1:(1.6-x, x) heated at 840 to 845°C for 144h in air (x=0 to 0.2). The characterization of the samples has been made by DTA, the measurements of XRD and DC electrical resistivity, SEM observation and ICP analysis. The Li-addition promotes the formation of the high-Tc phase. The sample with x=0.05 heated at 842°C for 144h exhibits Tc=116K, while Tc=109K for the Li-free sample (x=0) heated at 842°C for 120h. The results of ICP analysis showed that the Li content of the samples heated at 842°C for 120h was very low.

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