| Ca含量对Bi-2223超导带材的结构及电流传输性能的影响 |
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| 引用本文： | 姜春海,乔桂文.Ca含量对Bi-2223超导带材的结构及电流传输性能的影响[J].金属学报,2003,39(8):799-802. |
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| 作者姓名： | 姜春海 乔桂文 |
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| 作者单位： | 中国科学院金属研究所,沈阳,110016 |
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| 基金项目： | 国家重点基础研究发展规划资助项目 G1999064600 |
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| 摘 要： | 采用喷雾干燥法制备了4种不同Ca含量的BSCCO 2223初始粉末，并研究了Ca掺杂对Bi-2223银包套超导带材的相转化、微观结构和电流传输性能的影响．实验表明，增加Ca含量促进了2223相的转化和提高了带材的临界电流，但同时也在超导芯中引入了较多的富Ca的非超导杂相．分析认为，较高的Ca含量增加了体系烧结过程中液相的含量，进而促进了相转化和晶粒生长及晶间连接，因而改善了电流传输能力。
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| 关 键 词： | Bi-2223超导带材 Ca含量 电流传输性能 |
| 文章编号： | 0412-1961(2003)08-0799-04 |
| 修稿时间： | 2003年1月16日 |
INFLUENCE OF Ca CONTENT ON THE MICROSTRUCTURE AND TRANSPORT PROPERTY OF Ag-SHEATHED Bi-2223 TAPES |
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| JIANG Chunhai,QIAO Guiwen
Institute of Metal Research,The Chinese Academy of Sciences,Shenyang.INFLUENCE OF Ca CONTENT ON THE MICROSTRUCTURE AND TRANSPORT PROPERTY OF Ag-SHEATHED Bi-2223 TAPES[J].Acta Metallurgica Sinica,2003,39(8):799-802. |
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| Authors: | JIANG Chunhai QIAO Guiwen
Institute of Metal Research The Chinese Academy of Sciences Shenyang |
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| Affiliation: | JIANG Chunhai,QIAO Guiwen
Institute of Metal Research,The Chinese Academy of Sciences,Shenyang 110016 |
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| Abstract: | 4 kinds of BSCCO 2223 precursor powders with different Ca contents were prepared by spray drying method. The influence of Ca doping on the phase evolution, microstructure and transport property of Bi-2223/Ag tapes was studied. It is found that increasing the Ca content in initial stoichiometry can accelerate the 2223 phase formation and improve the transport Ic, however, much more Ca-rich non-superconducting secondary phases were also induced at the same time. It is supposed that Ca doping has increased the amount of liquid phase during the heat treatment, which in turn improved the phase formation, grain growth and grain connectivity, hence resulting in the enhanced current transport ability. |
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| Keywords: | Bi-2223/Ag tape Ca content transport property |
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