部分溶融法における急冷開始温度のBi_2Sr_2CaCu_2O_yの臨界電流密度への影響 The Influence of Starting Temperature of Quench upon the Critical Current Density of Bi_2Sr_2CaCu_2O_y Using Partially Melting Method

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We prepared Bi<SUB>2</SUB>Sr<SUB>2</SUB>CaCu<SUB>2</SUB>O<SUB>y</SUB> polycrystalline superconductor by partially melting method in HNO<SUB>3</SUB> or solid state method and investigated the influence of precursor condition and quench temperature upon the critical current density. The best starting temperatures of quench were 650°C in HNO<SUB>3</SUB> method and 500°C in solid state method. In these conditions, critical current densities were 198A/cm<SUP>2</SUP> in the former and 102A/cm<SUP>2</SUP> in the latter. We found that starting temperature of quench influences the break of junctions between grains by thermal contraction and condition of precursor influences the occuring defect and grain growth in melting process.<BR>It is important to select the best conditions of quench and precursor to prepare Bi<SUB>2</SUB>Sr<SUB>2</SUB>CaCu<SUB>2</SUB>O<SUB>y</SUB> polycrystalline superconductor with high critical temperature and density by partially melting and quench method.

収録刊行物

  • 粉体および粉末冶金  

    粉体および粉末冶金 45(12), 1131-1135, 1998-12-15 

    Japan Society of Powder and Powder Metallurgy

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各種コード

  • NII論文ID(NAID)
    10002053366
  • 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
    4629447
  • 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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