Fabrication and characterisation of superconducting Bi-2223/Ag tapes with high critical current densities in km lengths

Han, Z.; Bodin, P.; Wang, W.G.; Bentzon, M.D.; Skov-Hansen, P.; Goul, J.; Vase, P.

doi:10.1109/77.785003

Cited by 14 publications

(3 citation statements)

References 5 publications

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“…[1][2][3][4][5] The normally chosen characteristic parameter is the zero applied field 77 K critical current density, J c (0,77 K), and the largest reproducible values reported so far are in the 70 kA/cm 2 range. 6 In order to continue to increase J c it is necessary to understand and to minimize the effects of the multiple current-limiting mechanisms that operate in different field ranges for these tapes, for it is now understood that the mechanisms that limit J c in self-field may not be the same as those which limit J c in a magnetic field.…”

mentioning

confidence: 99%

The use of the in-field critical current density, Jc(0.1 T), as a better descriptor of (Bi, Pb)2Sr2Ca2Cu3Ox/Ag tape performance

Schwartzkopf

Jiang

Cai

et al. 1999

Applied Physics Letters

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Extended voltage-current characteristics of 13 optimized ͑Bi, Pb͒ 2 Sr 2 Ca 2 Cu 3 O x /Ag multifilamentary tapes from four different manufacturers were extensively evaluated so as to extract the field-dependent J c (H), the characteristic field H p obtained from the relation J c ϳexp (ϪH/H p ), and the irreversibility field H*. Values of the self-field critical current density J c (0 T, 77 K) ranged from 12 to 63 kA/cm 2 , I c (0 T,77 K) from 11 to 139 A, H p from 128 to 204 mT, and H* from 163 to 369 mT, this range thus being representative of present optimized composites. Self-field can strongly dominate J c (H) in fields below 20 mT; thus, J c (0 T,77 K) is a flawed parameter for characterizing tapes because of its very heavy dependence on self-field. We propose that a much better descriptor of tape performance is J c (0.1 T,77 K), because it lies outside the self-field and weak-link-destruction regimes and clearly within the flux-pinning-controlled domain where the connectivity-determined active cross-section carrying current is constant.

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mentioning

confidence: 99%

The use of the in-field critical current density, Jc(0.1 T), as a better descriptor of (Bi, Pb)2Sr2Ca2Cu3Ox/Ag tape performance

Schwartzkopf

Jiang

Cai

et al. 1999

Applied Physics Letters

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“…However, if the HTS fill factor becomes too large, the tape is difficult to handle both during and after manufacturing, because the Agalloy gives the material strength and flexibility as described earlier. Typical HTS fill factors for long-length Bi-2223 tapes are in the range of [6,37] 23-35%. Fill factors up to 72% have been demonstrated by the accordion-folding method [38], but only for short-length, non-bendable conductors for straight current leads.…”

Section: Composite Structurementioning

confidence: 99%

Current status of high-T_cwire

Vase¹,

Flükiger

Leghissa

et al. 2000

Supercond. Sci. Technol.

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This paper is the result of the work of a SCENET (The European Network for Superconductivity) material working group's efforts on giving values for present and future expected performance of high-temperature superconducting (HTS) wires and tapes. The purpose of the work is to give input to the design of HTS applications like power cables, motors, current leads, magnets, transformers and generators. The current status performance values are supposed to be used in the design of today's prototypes and the future values for the design of fully commercial HTS applications of the future. We focus on what is expected to be the relevant parameters for HTS application design. The most successful technique by far for making HTS tapes has been on the (Bi, Pb)2Sr2Ca2Cu3Ox (Bi-2223) material by the powder-in-tube (PIT) technique and this paper therefore focuses on giving the current status and expected future performance for Bi-2223 tapes.

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“…The development of high-temperature superconducting (HTS) tapes has advanced to a point where commercial applications may be considered. Long-length, robust BSCCO/Ag tapes with high current densities are available today on the market [1,2]. Although manufactured primarily for DC purposes, such tapes have been used in demonstrator projects of e.g., power transmission cables [3][4][5] and power transformers [6] where the HTS components have been installed in power networks.…”

Section: Introductionmentioning

confidence: 99%

The influence of thermal gradients on AC losses in high-temperature superconducting coils

Magnusson

Runde

2002

Supercond. Sci. Technol.

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As high-temperature superconducting (HTS) tapes approach commercially acceptable performance levels, attention should be paid to how to utilize these tapes in real applications. One of the most important factors is the AC loss. When wound into a coil the operating conditions of the HTS tape vary in different parts of the coil. The optimum operating current, with respect to the AC losses, increases radially in the coil as the magnetic field decreases. With a constant current in the coil, large parts of the coil will not be optimally operated. The optimum operating current of the HTS tape also varies with temperature. In this paper we propose to use a controlled temperature distribution in the coil so that the coil can be operated at its optimum current in the entire coil. The potential for loss reduction with a controlled temperature distribution in a large AC HTS coil is about 10%.

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Fabrication and characterisation of superconducting Bi-2223/Ag tapes with high critical current densities in km lengths

Cited by 14 publications

References 5 publications

The use of the in-field critical current density, Jc(0.1 T), as a better descriptor of (Bi, Pb)2Sr2Ca2Cu3Ox/Ag tape performance

The use of the in-field critical current density, Jc(0.1 T), as a better descriptor of (Bi, Pb)2Sr2Ca2Cu3Ox/Ag tape performance

Current status of high-T_cwire

The influence of thermal gradients on AC losses in high-temperature superconducting coils

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Fabrication and characterisation of superconducting Bi-2223/Ag tapes with high critical current densities in km lengths

Cited by 14 publications

References 5 publications

The use of the in-field critical current density, Jc(0.1 T), as a better descriptor of (Bi, Pb)2Sr2Ca2Cu3Ox/Ag tape performance

The use of the in-field critical current density, Jc(0.1 T), as a better descriptor of (Bi, Pb)2Sr2Ca2Cu3Ox/Ag tape performance

Current status of high-Tcwire

The influence of thermal gradients on AC losses in high-temperature superconducting coils

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Product

Resources

About

Current status of high-T_cwire