High-Pressure Synthesized Nanostructural ${\hbox {MgB}}_{2}$ Materials With High Performance of Superconductivity, Suitable for Fault Current Limitation and Other Applications

Prikhna, T. A.; Gawalek, W.; Goldacker, W.; Savchuk, Yaroslav; Noudem, Jacques; Солдатов, А. В.; Eisterer, M.; Weber, H.W.; Serga, M.; Дуб, С. Н.; Wendt, Michael; You, Shujie; Sergienko, Nina; Moshchil, Viktor; Ткач, В. М.; Dellith, Jan; Karau, F.; Tomsic, M.; Shmidt, Christa; Fesenko, I. P.; Habisreuther, T.; Litzkendorf, D.; Meerovich, V.; Sverdun, V. B.

doi:10.1109/tasc.2010.2096494

Cited by 8 publications

(4 citation statements)

References 3 publications

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“…The recently developed manufacturing technologies use high pressure and various doping additions to prepare bulk MgB 2 materials with a high critical current density J c . The evaluations of J c using the results of the magnetization measurements and the critical state model give the values of 10 6 A/cm 2 at 20 K in the magnetic field up to 1 T [3,[8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…It is expected that bulk MgB 2 -based materials will be able to successfully compete with high-temperature bulk superconductors in fault current limiters, electrical motors, generators, superconducting magnets, passive levitated bearings and shields for AC and DC magnetic fields [1][2][3][4][5][6][7][8]. Recently developed manufacturing technologies use high pressure and various doping additions to prepare bulk MgB 2 materials with a high critical current density J c .…”

Section: Introductionmentioning

confidence: 99%

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AC losses in high pressure synthesized MgB₂bulk rings measured by a transformer method

Meerovich¹,

Prikhna²,

Gawalek³

et al. 2013

Supercond. Sci. Technol.

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The recently developed manufacturing technologies use high pressure and various doping additions to prepare bulk MgB 2 -based materials with a high critical current density measured by the magnetization methods. We use a contactless transformer method, which is based on studying the superconductor response to an induced transport current, to measure AC losses in bulk MgB 2 rings synthesized under high pressure. The obtained dependence of the losses on the primary current (applied magnetic field) is fitted by the power law with the exponent ~2.1 instead of the cubic dependence predicted by Bean's model and power-law electric field-current density (E-J) characteristics with a large exponent. The unusually strong dependence of AC losses on the frequency was also observed. It was shown that the E-J characteristic of bulk MgB 2 is well fitted by the dependence used in the extended critical state model based on account of the viscous vortex motion in the flux flow regime. Numerical simulation using this E-J characteristic gives the current and frequency AC loss dependences which well agree with the experimental results.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

AC losses in high pressure synthesized MgB₂bulk rings measured by a transformer method

Meerovich¹,

Prikhna²,

Gawalek³

et al. 2013

Supercond. Sci. Technol.

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“…The comprehensive study of preparation-structure-properties correlations has shown that the quality of the initial boron and magnesium diboride is of primary importance for attaining a high superconducting performance [4,[6][7][8]. The quality and impurity content (C, O, H, etc.)…”

Section: Resultsmentioning

confidence: 99%

Spark Plasma Synthesis and Sintering of Superconducting MgB<sub>2</sub>-Based Materials

Prikhna

Noudem

Gawalek³

et al. 2012

MSF

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Superconducting (SC) and mechanical properties of spark plasma (or SPS) produced MgB2 –based materials allow their efficient applications in fault current limiters, superconducting electromotors, pumps, generators, magnetic bearings, etc. The synthesized from Mg and B at 50 MPa, 1050 °C for 30 min material has a density of 2.52 g/cm3, critical current density, jc = 7.1•105 A/cm2 at 10 K , 5.4 •105 A/cm2 at 20 K, and 9•104 A/cm2 at 35 K in zero magnetic field; at 20 K its field of irreversibility Birr(20)=7 T and upper critical field Bc2(20)=11 T; microhardness HV=10.5 GPa and fracture toughness K1C =1.7 MPa•m1/2 at 4.9 N-load. SPS-manufactured in- situ MgB2-based materials usually have somewhat higher jc than sintered ex-situ. The pressure variations from 16 to 96 MPa during the SPS-process did not affect material SC characteristics significantly; the jc at 10-20 K was slightly higher and the material density was higher by 11%, when pressures of 50-96 MPa were used. The structure of SPS-produced MgB2 material contains Mg-B-O inclusions and inclusions of higher borides (of compositions near MgB4, MgB7, MgB12, MgB17, MgB20), which can be pinning centers. The presence of higher borides in the MgB2 structure can be revealed by the SEM and Raman spectroscopy.

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“…The MgB 2 superconductors with a bulk density of about 2.63 g/cm 3 are the lightest materials among practical superconductors. This makes MgB 2 attractive for portable applications [ 143 , 144 , 145 , 146 , 147 , 148 , 149 , 150 , 151 , 152 , 153 , 154 , 155 , 156 , 157 , 158 , 159 , 160 , 161 , 162 , 163 , 164 , 165 , 166 , 167 , 168 , 169 , 170 , 171 , 172 , 173 , 174 , 175 , 176 , 177 , 178 , 179 ], especially for aviation and space technology [ 26 , 146 , 171 ].…”

Section: Application Of Bulk Mgb 2 Superconductorsmentioning

confidence: 99%

Bulk MgB2 Superconducting Materials: Technology, Properties, and Applications

Prikhna,

Sokolovsky,

Moshchil

2024

Materials

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The intensive development of hydrogen technologies has made very promising applications of one of the cheapest and easily produced bulk MgB2-based superconductors. These materials are capable of operating effectively at liquid hydrogen temperatures (around 20 K) and are used as elements in various devices, such as magnets, magnetic bearings, fault current limiters, electrical motors, and generators. These applications require mechanically and chemically stable materials with high superconducting characteristics. This review considers the results of superconducting and structural property studies of MgB2-based bulk materials prepared under different pressure–temperature conditions using different promising methods: hot pressing (30 MPa), spark plasma sintering (16–96 MPa), and high quasi-hydrostatic pressures (2 GPa). Much attention has been paid to the study of the correlation between the manufacturing pressure–temperature conditions and superconducting characteristics. The influence of the amount and distribution of oxygen impurity and an excess of boron on superconducting characteristics is analyzed. The dependence of superconducting characteristics on the various additions and changes in material structure caused by these additions are discussed. It is shown that different production conditions and additions improve the superconducting MgB2 bulk properties for various ranges of temperature and magnetic fields, and the optimal technology may be selected according to the application requirements. We briefly discuss the possible applications of MgB2 superconductors in devices, such as fault current limiters and electric machines.

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High-Pressure Synthesized Nanostructural ${\hbox {MgB}}_{2}$ Materials With High Performance of Superconductivity, Suitable for Fault Current Limitation and Other Applications

Cited by 8 publications

References 3 publications

AC losses in high pressure synthesized MgB₂bulk rings measured by a transformer method

AC losses in high pressure synthesized MgB₂bulk rings measured by a transformer method

Spark Plasma Synthesis and Sintering of Superconducting MgB<sub>2</sub>-Based Materials

Bulk MgB2 Superconducting Materials: Technology, Properties, and Applications

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High-Pressure Synthesized Nanostructural ${\hbox {MgB}}_{2}$ Materials With High Performance of Superconductivity, Suitable for Fault Current Limitation and Other Applications

Cited by 8 publications

References 3 publications

AC losses in high pressure synthesized MgB2bulk rings measured by a transformer method

AC losses in high pressure synthesized MgB2bulk rings measured by a transformer method

Spark Plasma Synthesis and Sintering of Superconducting MgB<sub>2</sub>-Based Materials

Bulk MgB2 Superconducting Materials: Technology, Properties, and Applications

Contact Info

Product

Resources

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AC losses in high pressure synthesized MgB₂bulk rings measured by a transformer method

AC losses in high pressure synthesized MgB₂bulk rings measured by a transformer method