Manufacturing, Structure, Properties of MgB2-Based Materials

Prikhna, T. A.; Eisterer, M.; Rindfleisch, M.; Ponomaryov, Semyon; Tomsic, M.; Romaka, V.V.; Moshchil, V. E.; Kozyrev, Artem; Karpets, M. V.; Shaternik, A. V.

doi:10.1007/s10948-019-5062-z

Cited by 2 publications

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“…The superconducting characteristics of MgB 2 materials depend on many factors and their combination. Very deep and comprehensive studies of the synthesis process of MgB 2 -based materials, the correlation between material structure and superconducting characteristics, and the manufacturing technology have been performed by the authors of [ 7 , 8 , 9 , 10 , 11 , 16 , 19 , 73 , 76 , 82 , 84 , 85 , 98 , 99 , 101 , 102 , 103 , 104 , 105 , 106 , 107 , 108 , 109 , 110 , 111 , 112 , 113 , 114 , 115 , 116 , 117 , 118 , 119 , 120 , 121 , 122 , 123 , 124 , 125 , 126 , 127 , 128 , 129 , 130 ]. These correlations were comprehensively studied for materials prepared using initial powders of MgB 2 and stoichiometric Mg:2B mixtures (typical characteristics are given in Table 1 ) at manufacturing temperatures in the range of 600–1100 °C under different pressure conditions using the methods noted above.…”

Section: Effect Of Manufacturing Pressure–temperature–time Conditions...mentioning

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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