| Bi-2212/Ag带材的制备与性能 |
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| 引用本文： | 郑会玲,李成山,闫果,熊晓梅,刘国庆,江林,张平祥,杜明焕.Bi-2212/Ag带材的制备与性能[J].稀有金属材料与工程,2008(Z4). |
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| 作者姓名： | 郑会玲 李成山 闫果 熊晓梅 刘国庆 江林 张平祥 杜明焕 |
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| 作者单位： | 西北有色金属研究院;陕西科技大学; |
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| 基金项目： | 陕西省13115项目资助(2007ZDKG-45) |
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| 摘 要： | 研究了名义化学成分为Bi2.10Sr1.96Ca1.0Cu2.00Ox的Bi-2212/Ag超导带材的制备和性能,采用X射线衍射技术和扫描电镜技术分析了Bi-2212相的合成过程和Bi-2212/Ag超导带材中超导体的微观组织形貌,在4.2～30K温度范围内测量了Bi-2212/Ag超导带材样品的临界电流密度(Jc),应用背景场的磁场(B)最高达到7T。结果表明,Bi2.10Sr1.96Ca1.0Cu2.00Ox的粉末在空气中多次烧结后,2212相生成量可以达到91.6%;Bi-2212/Ag超导带材中晶粒间有良好的连接性,但微观组织中仍存在大量的缩孔。在磁场高于5T和温度低于20K时,Jc随应用磁场和操作温度升高而缓慢下降,而当磁场小于5T和温度超过20K时,Jc快速下降。通过熔化-慢冷工艺得到的Bi-2212/Ag带材其临界电流密度Jc可达到320A/mm2(4.2K,7T)。
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| 关 键 词： | Bi-2212/Ag带材 熔化-慢冷工艺 临界电流密度(Jc) |
Preparation and Properties of Bi2212/Ag Tapes |
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| Abstract: | The preparation and properties of Bi-2212/Ag tapes with a nominal chemical composition of Bi2.10Sr1.96Ca1.0Cu2.00Ox have been studied in this paper. The synthesis of Bi-2212 phase and the microstructure of Bi-2212/Ag tape have been analyzed by XRD and SEM. The critical currents density (Jc) has been measured in the temperature range from 4.2 K to 30 K in applied magnetic field (B) up to 7 T. The results show that the 2212 phase of 91.6% can be obtained in Bi2.10Sr1.96Ca1.0Cu2.00Ox powder sintered in air; go... |
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| Keywords: | Bi-2212/Ag tape melting slow-cooling process critical current density (Jc) |
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