Thermal conductivity of single and multi-stacked DI-BSCCO tapes

Naito, Tomoyuki; Fujishiro, Hiroyuki; Yamada, Yuichi

doi:10.1016/j.cryogenics.2009.06.005

Cited by 21 publications

(5 citation statements)

References 10 publications

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“…In these applications, typically Ag-5.4 wt % Au alloy sheaths are used for Bi-2223 wires to decrease thermal conductivity. 50) 6. Future Perspectives Continual efforts for the development of Bi-2223 wires have enabled breakthroughs in practical applications.…”

Section: Current Leadsmentioning

confidence: 99%

Present Status and Future Perspective of Bismuth-Based High-Temperature Superconducting Wires Realizing Application Systems

Sato

Kobayashi

Nakashima

2011

Jpn. J. Appl. Phys.

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Among a series of high-temperature superconducting materials that have been discovered to date, (Bi,Pb)2Sr2Ca2Cu3O10-x is the best candidate for superconducting wires that are long with commercial productivity, and critical current performance. In particular, the controlled overpressure (CT-OP) sintering technique gave us a 100% density of (Bi,Pb)2Sr2Ca2Cu3O10-x portion, which leads to robustness, increase in critical current, and mechanical tolerance. Many application prototypes are already verified and are being evaluated worldwide. Current leads for large magnets and magnetic billet heaters are already commercial products. Commercial applications for power cables, motors for ship propulsion and electric vehicles, and many kinds of magnets are promising in the near future.

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Section: Current Leadsmentioning

confidence: 99%

Present Status and Future Perspective of Bismuth-Based High-Temperature Superconducting Wires Realizing Application Systems

Sato

Kobayashi

Nakashima

2011

Jpn. J. Appl. Phys.

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“…where R Ag is the resistance per unit length of the conductor. Ag ratio of this conductor is 1.8, and RRR is 15 [8]. The heat generation is given by IE.…”

Section: Discussionmentioning

confidence: 99%

Design, Fabrication and Soundness Test of A Bi2223 Magnet Designed for Cooling by Liquid Hydrogen

Imagawa

Iwamoto

Hamaguchi

et al. 2022

IEEE Trans. Appl. Supercond.

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The critical heat flux in liquid hydrogen is ten times higher than that in liquid helium and is approximately half of that in liquid nitrogen. Since the resistivity of pure metal such as copper or silver at 20 K is less than one-hundredth of that at 300 K, HTS magnets immersed in liquid hydrogen are expected to satisfy the fully cyostable condition or to be stable against high resistive heat generation enough for quench detection at a practical current density. In order to examine cryostability of HTS magnets in liquid hydrogen, a pool-cooled Bi2223 magnet with a 5 T magnetic field at 20 K has been designed, fabricated and tested in liquid nitrogen prior to excitation tests in liquid hydrogen. The magnet consists of six outer double pancake coils with the inner diameter of 0.20 m and four inner double pancake coils with the outer diameter of 0.16 m. The resistive voltage to initiate thermal runaway in the coil assembly in liquid nitrogen was higher than 1 V that is sufficient high for quench detection.

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“…With roughly 50% finegrain A15 in the non-Cu fraction of high-J E Nb 3 Sn, the pinning-force in the A15 layer is of order 50-150 GN m −3 in the relevant magnetic-field region (figure 3), whereas the pinning-force in HTS can be as high as 400-1700 GN m −3 above 4 T [44]. This one order-of-magnitude stronger pinningforce, combined with a 5-10 times higher T c of HTS, a factor 2-3 increased thermal-conductivity, and approximately factor 20 increased heat-capacity of the relevant materials [43,[45][46][47], as well as a factor 2-5 lower n-value (section 5.8), makes it much more difficult for small disturbances to dislodge fluxlines and trigger a sudden and rapid transition to the normal state, or 'quench' (see section 5.11.1). Hence, operation of HTS conductors at temperatures above 4.2 K provides much more stable magnet operating conditions than LTS at 4.2 K.…”

Section: Operating Above T = 42 K Provides Resiliencementioning

confidence: 99%

High temperature superconductors for commercial magnets

Godeke

2023

Supercond. Sci. Technol.

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The steadily increasing magnetic ﬁelds that can be generated with superconducting magnets are reaching the limits of what is achievable with low-temperature superconductors (LTS). At the same time, a reduction of fossil-fuel extraction will amplify the already limited availability of helium as a coolant for superconducting magnets in the near future. Hence, manufacturers of commercial applications that rely on superconducting magnets have become increasingly interested in exploring technologies that enable a move beyond the magnetic-ﬁeld limitations posed by LTS conductors, and/or enable higher operating temperatures to allow for cryogen-free operation. High-temperature superconductors (HTS), such as [RE]Ba2Cu3O7-δ (REBCO), Bi2Sr2CaCu2O8+x (Bi-2212), and Bi2-xPbxSr2Ca2Cu3O10-y (Bi-2223) have all matured to a certain commercial extent, and have thereby become enablers for such technologies. The emergence of various new commercial magnet-systems that utilize HTS, suggests that we are at the dawn of a wider commercial implementation. A review of which HTS properties are critical for these magnets, what is currently available, and what is missing, is therefore considered timely and appropriate in this context.

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Thermal conductivity of single and multi-stacked DI-BSCCO tapes

Abstract: We have measured the temperature dependence of the thermal conductivity,

Cited by 21 publications

References 10 publications

Present Status and Future Perspective of Bismuth-Based High-Temperature Superconducting Wires Realizing Application Systems

Present Status and Future Perspective of Bismuth-Based High-Temperature Superconducting Wires Realizing Application Systems

Design, Fabrication and Soundness Test of A Bi2223 Magnet Designed for Cooling by Liquid Hydrogen

High temperature superconductors for commercial magnets

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