(Key Laboratory of Applied Superconductivity, Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190China)
Keywords:
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CLC:
PACS:
TM262
DOI:
10.7502/j.issn.1674-3962.2013.09.02
DocumentCode:
Abstract:
The newly discovered iron-based superconductors have caused great interest for high-field applications due to their well properties such as high transition temperature, ultrahigh upper critical field and low anisotropy. The iron-based superconducting wires and tapes are commonly prepared by the powder-in-tube (PIT) process. In this paper, we focus on the fabrication techniques to realize high Jc values such as chemical composition, optimal heating conditions, sheath material, doped elements, hot isostatic press and rolling texture，particularly for 122-type pnictide wires and tapes. Excitingly, so far high transport Jc value of 1.7×104 A/cm2 at 4.2 K and 10 T has been obtained in iron-based tapes, closed to the practical level. Finally, a perspective and future development of PIT pnictide wires and tapes are given