The Formation of the High-Tc Phase in the Bi-Pb-Sr-Ca-Cu-O in Samples Enclosed in Silver Pipe.

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  • Egi Toshio
    Department of Applied Chemistry, Faculty of Engineering, Okayama University
  • Hosotani Katsunori
    Department of Applied Chemistry, Faculty of Engineering, Okayama University
  • Nanba Tokuro
    Department of Applied Chemistry, Faculty of Engineering, Okayama University
  • Takada Jun
    Department of Applied Chemistry, Faculty of Engineering, Okayama University

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  • 銀パイプに封入した試料でのＢｉ系高温相の生成
  • ギン パイプ ニ フウニュウシタ シリョウ デ ノ Biケイ コウオンソウ ノ

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Abstract

The formation of the high-Tc phase in the Bi-Pb-Sr-Ca-Cu-O system has been studied in ground powder samples enclosed in silver pipes.The samples with a composition of Bi:Pb:Sr:Ca:Cu=0.9:0.2:1.0:1.0:1.6 prepared by heating at 850°C for 24h were mechanically ground for various periods, put into silver pipes and heated at 840-850°C.The formation of the high-Tc phase was found to be promoted in the samples enclosed in the silver pipes, depending upon three factors: grinding time, atmosphere in the pipe and reaction between the powder sample and the silver pipe.

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