Overview of the recent performance of DI-BSCCO wire

► We developed the 1000m-long Bi2223 wires with high Ic and the other performances. ► The effects of the carrier level with non-stoichiometric oxygen on Ic were studied. ► The lamination with stainless steel drastically enhances wires’ mechanical strength. ► The current lead-purpose wires sheathed w...

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Bibliographic Details
Published in:Cryogenics (Guildford) 2012-12, Vol.52 (12), p.713-718
Main Authors: Nakashima, T., Kobayashi, S., Kagiyama, T., Yamazaki, K., Kikuchi, M., Yamade, S., Hayashi, K., Sato, K., Osabe, G., Fujikami, J.
Format: Article
Language:English
Subjects:
Applied sciences
Bi2223 tape
BISMUTH OXIDE
Carrier density
Carrier doping
Critical current density
Cryogenics
DENSITY
Electric wire
ELECTRICAL CONDUCTIVITY
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Heat transfer
HEAT TREATING
Heat treatment
MAGNETIC FIELD
Magnetic fields
Mechanical strength
Refrigerating engineering. Cryogenics. Food conservation
SUPERCONDUCTIVITY
SUPERCONDUCTORS
Thermal conductivity
WIRE
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Summary:► We developed the 1000m-long Bi2223 wires with high Ic and the other performances. ► The effects of the carrier level with non-stoichiometric oxygen on Ic were studied. ► The lamination with stainless steel drastically enhances wires’ mechanical strength. ► The current lead-purpose wires sheathed with Ag–Au alloy showed Ic of over 200A. Sumitomo Electric has been developing the silver-sheathed Bi2223 multi-filamentary wires since the discovery of Bi-based superconductors. DI-BSCCO (Dynamically-Innovative BSCCO) is the high performance wires produced with the controlled-overpressure (CT-OP) sintering technique. The recent R&D activities have enabled to produce the 1000m-long wires with Ic of 200A and the maximum Ic reached 250A at 77K by short sample. Besides, the fine control of the carrier density with the non-stoichiometric oxygen enhanced the in-field Ic performances at lower temperature. At a magnetic field of 3T applied normal to wire surface, the Ic of 280A at 30K, and 420A at 20K were successfully achieved. To meet the growing needs for various high temperature superconducting applications, Type HT wire with high mechanical strength and Type G wire with low thermal conductivity have been developed.
ISSN:0011-2275
1879-2235
DOI:10.1016/j.cryogenics.2012.06.018