Bi-2212相へのPbとLiドープ Li Doping into the Pb substituted Bi-2212 Phase by Electrochemical Method

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Effects of electrochemical Li-doping to the Pb-substituted Bi-2212 phase on its structural and superconducting properties were studied. Bi<SUB>1.8</SUB>Pb<SUB>0.2</SUB>Sr<SUB>1.5</SUB>Ca<SUB>1.5</SUB>Cu<SUB>2</SUB>O<SUB>z</SUB> was lithiated through an electrochemical method at constant applied potential at room temperature. In the electrochemically Li-doping samples, the original crystal symmetry, tetragonal structure, was maintained and any secondary phase was not formed. The amount of doped Li for Bi<SUB>1.8</SUB>Pb<SUB>0.2</SUB>Sr<SUB>1.5</SUB>Ca<SUB>1.5</SUB>Cu<SUB>2</SUB>O<SUB>z</SUB> was much lager than that for Bi<SUB>2</SUB>Sr<SUB>1.5</SUB>Sr<SUB>1.5</SUB>Ca<SUB>1.5</SUB>Cu<SUB>2</SUB>O<SUB>z</SUB> at the same reaction periods. Analysed maximum Li content y for Li<SUB>y</SUB>Bi<SUB>1.8</SUB>Pb<SUB>0.2</SUB>Sr<SUB>1.5</SUB>Ca<SUB>1.5</SUB>Cu<SUB>2</SUB>O<SUB>z</SUB> was found to be 0.53, which was remarkably high in comparison with y=0.37 for Li<SUB>y</SUB>Bi<SUB>2</SUB>Sr<SUB>1.5</SUB>Ca<SUB>1.5</SUB>Cu<SUB>2</SUB>O<SUB>z</SUB> The lattice parameters (a, c) of Li<SUB>y</SUB>Bi<SUB>1.8</SUB>Pb<SUB>0.2</SUB>Sr<SUB>1.5</SUB>Ca<SUB>1.5</SUB>Cu<SUB>2</SUB>O<SUB>z</SUB> increased continuously in a similar trend to that of Li<SUB>y</SUB>Bi<SUB>2</SUB>Sr<SUB>1.5</SUB>Ca<SUB>1.5</SUB>Cu<SUB>2</SUB>O<SUB>z</SUB> Tc remains almost constant around 85K as the Li content y increased.

収録刊行物

  • 粉体および粉末冶金  

    粉体および粉末冶金 44(8), 792-796, 1997-08-15 

    Japan Society of Powder and Powder Metallurgy

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各種コード

  • NII論文ID(NAID)
    10002014486
  • NII書誌ID(NCID)
    AN00222724
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    05328799
  • NDL 記事登録ID
    4275747
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-274
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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