Rational design of MgB2 conductors toward practical applications

Patel, Dipak; Hossain, Md. Shahriar A.; Motaman, Ashkan; Barua, Shaon; Shahabuddin, Mohammed; Kim, Jung Ho

doi:10.1016/j.cryogenics.2014.04.016

Cited by 52 publications

(34 citation statements)

References 62 publications

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“…Apparent in-field increase of critical current densities has been reached by different types of doping [6][7][8][9]. However, critical current densities of PIT MgB 2 wires do not meet requirements for practical use and need to be improved further.…”

Section: Introductionmentioning

confidence: 95%

Microstructure of MgB 2 superconducting wire prepared by internal magnesium diffusion and in-situ powder-in-tube processes – Secondary phase intergrain nanolayers as an oxygen content indicator

Rosová

Kòváč

Hušek

et al. 2015

Physica C: Superconductivity and its Applications

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Section: Introductionmentioning

confidence: 95%

Microstructure of MgB 2 superconducting wire prepared by internal magnesium diffusion and in-situ powder-in-tube processes – Secondary phase intergrain nanolayers as an oxygen content indicator

Rosová

Kòváč

Hušek

et al. 2015

Physica C: Superconductivity and its Applications

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“…15 Details on practical applications of MgB 2 -based wires can be found in a recent review article. 4 Such applications make use of the two-band superconducting properties of MgB 2 , which lead to relatively high values of the critical current density (J c ) and critical magnetic field (H c ). Since these two parameters determine the basic superconducting characteristics of MgB 2 , they have been mostly addressed in recent research.…”

mentioning

confidence: 99%

Electron paramagnetic resonance and Raman spectroscopy studies on carbon-doped MgB2 superconductor nanomaterials

Bateni

Erdem

Repp

et al. 2015

Journal of Applied Physics

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Articles you may be interested inThe critical parameters in in-situ MgB2 wires and tapes with ex-situ MgB2 barrier after hot isostatic pressure, cold drawing, cold rolling and doping Doping effect of nano-Ho2O3 and naphthalene in MgB2 superconductor prepared by powder-in-sealed-tube method A new scaling relation for n-AlN doped superconducting MgB2 Effect of thermal strain on Jc and Tc in high density nano-SiC doped MgB2 J. Appl. Phys. 109, 07E108 (2011); 10.1063/1.3549590 Superconductivity and the disorder effect in Ag and Al double doped Mg B 2Undoped and carbon-doped magnesium diboride (MgB 2 ) samples were synthesized using two sets of mixtures prepared from the precursors, amorphous nanoboron, and as-received amorphous carbon-doped nanoboron. The microscopic defect structures of carbon-doped MgB 2 samples were systematically investigated using X-ray powder diffraction, Raman and electron paramagnetic resonance spectroscopy. Mg vacancies and C-related dangling-bond active centers could be distinguished, and sp 3 -hybridized carbon radicals were detected. A strong reduction in the critical temperature T c was observed due to defects and crystal distortion. The symmetry effect of the latter is also reflected on the vibrational modes in the Raman spectra. V C 2015 AIP Publishing LLC.

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“…In addition, its transition temperature of 39 K allows it to operate at higher temperatures up to 25 K [3][4][5][6]. Owing to these benefits [7,8], there have been many recent reports on MgB 2 -conductor-based MRI magnets [9][10][11][12][13][14]. In fact, PARAmed has already commercialized LHe-free MRI systems, called as "open sky MRI".…”

Section: Introductionmentioning

confidence: 99%

MgB₂superconducting joints for persistent current operation

Patel

Hossain

See

et al. 2015

Supercond. Sci. Technol.

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High-performance superconducting joints are essential for realizing persistent-mode magnets. Herein, we propose a concept and fabrication of such superconducting joints, which yielded reliable performance in the operating temperature range of 4.2-25 K. MgB 2 -MgB 2 joints in magnets are known to result in deterioration of localized electrical, thermal, and mechanical properties. To overcome these problems, the ends of the two wires are inserted into a pellet press, which is then filled with a mixture of unreacted magnesium and boron powders, followed by heat treatment. The critical current capacity and joint resistance were precisely evaluated by the standard four-probe method in open-circuit and by field-decay measurements in a closed-loop, respectively. These joints demonstrated up to 66% of the current-carrying capacity of unjoined wire at 20 K, 2 T and joint resistance of 1.4 x 10 −12 Ω at 4.2 K in self-field. AbstractHigh-performance superconducting joints are essential for realizing persistent-mode magnets.Herein, we propose a new process and fabrication of such superconducting joints, which yielded reliable performance in the operating temperature range of 4.2 K to 25 K. MgB 2 -MgB 2 joints in magnets, are known to result in deterioration of localized electrical, thermal, and mechanical properties. To overcome these problems, the ends of the two wires are inserted into a pellet press, which is then filled with a mixture of unreacted magnesium and boron powders, followed by heat treatment. The critical current capacity and joint resistance were precisely evaluated by the standard four-probe method in open-circuit and by fielddecay measurements in a closed-loop, respectively. These joints demonstrated up to 66% of the current-carrying capacity of unjoined wire at 20 K, 2 T and joint resistance of < 1.4 x 10 -12 Ω at 4.2 K in self-field.

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Rational design of MgB2 conductors toward practical applications

Cited by 52 publications

References 62 publications

Microstructure of MgB 2 superconducting wire prepared by internal magnesium diffusion and in-situ powder-in-tube processes – Secondary phase intergrain nanolayers as an oxygen content indicator

Microstructure of MgB 2 superconducting wire prepared by internal magnesium diffusion and in-situ powder-in-tube processes – Secondary phase intergrain nanolayers as an oxygen content indicator

Electron paramagnetic resonance and Raman spectroscopy studies on carbon-doped MgB2 superconductor nanomaterials

MgB₂superconducting joints for persistent current operation

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Rational design of MgB2 conductors toward practical applications

Cited by 52 publications

References 62 publications

Microstructure of MgB 2 superconducting wire prepared by internal magnesium diffusion and in-situ powder-in-tube processes – Secondary phase intergrain nanolayers as an oxygen content indicator

Microstructure of MgB 2 superconducting wire prepared by internal magnesium diffusion and in-situ powder-in-tube processes – Secondary phase intergrain nanolayers as an oxygen content indicator

Electron paramagnetic resonance and Raman spectroscopy studies on carbon-doped MgB2 superconductor nanomaterials

MgB2superconducting joints for persistent current operation

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Product

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About

MgB₂superconducting joints for persistent current operation