Development of Powder-in-Tube Processed Iron Pnictide Wires and Tapes

被引：33

作者：

Ma, Yanwei ^{[1
]}

Wang, Lei ^{[1
]}

Qi, Yanpeng ^{[1
]}

Gao, Zhaoshun ^{[1
]}

Wang, Dongliang ^{[1
]}

Zhang, Xianping ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Elect Engn, Key Lab Appl Superconduct, Beijing 100190, Peoples R China

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2011年 / 21卷 / 03期

关键词：

Addition; Ag sheath; critical current; grain connectivity; iron pnictides; wires and tapes;

D O I：

10.1109/TASC.2010.2079311

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The development of PIT fabrication process of iron pnictide superconducting wires and tapes has been reviewed. Silver was found to be the best sheath material, since no reaction layer was observed between the silver sheath and the superconducting core. The grain connectivity of iron pnictide wires and tapes has been markedly improved by employing Ag or Pb as dopants. At present, critical current densities in excess of 3750 A/cm(2) (I-c = 37.5 A) at 4.2 K have been achieved in Ag-sheathed SrKFeAs wires prepared with the above techniques, which is the highest value obtained in iron-based wires and tapes so far. Moreover, Ag-sheathed Sm-1111 superconducting tapes were successfully prepared by PIT method at temperatures as low as similar to 900 degrees C, instead of commonly used temperatures of similar to 1200 degrees C. These results demonstrate the feasibility of producing superconducting pnictide composite wires, even grain boundary properties require much more attention.

引用

页码：2878 / 2881

页数：4

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