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The effect of oxyge...
The effect of oxygen distribution inhomogeneity and presence of higher borides on the critical current density improvement of nanostructural MgB2
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- Prikhna, Tetiana (författare)
- Institute for Superhard Materials of the National Academy of Sciences of Ukraine, Kiev 04074, Ukraine
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- Gawalek, Wolfgang (författare)
- Instistut für Photonische Techologien, Jena, D-07745, Germany
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- Savchuk, Yaroslav (författare)
- Institute for Superhard Materials of the National Academy of Sciences of Ukraine, Kiev 04074, Ukraine
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- Serga, Maxim (författare)
- Institute for Superhard Materials of the National Academy of Sciences of Ukraine, Kiev 04074, Ukraine
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- Habisreuther, Tobias (författare)
- Instistut für Photonische Techologien, Jena, D-07745, Germany
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- Soldatov, Alexander (författare)
- Luleå tekniska universitet,Materialvetenskap
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- You, Shujie (författare)
- Luleå tekniska universitet,Materialvetenskap
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- Eisterer, Michael (författare)
- Vienna University of Technology, Atominstitut, 1020 Viennea, Austria
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- Weber, Harald W. (författare)
- Vienna University of Technology, Atominstitut, 1020 Viennea, Austria
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- Noudem, Jacques (författare)
- CNR/CRISMAT, 6, Bd du Maréchal Juin, CNRS UMR 6508, 14050, Caen, France
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- Sokolovsky, Vladimir (författare)
- Ben-Gurion Universityof the Negev, P.O.B. 653, Beer-Sheva 8410,5 Israel
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- Karau, Friedrich (författare)
- H.C. Starck GmbH, Goslar 38642, Germany
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- Dellith, Jan (författare)
- Instistut für Photonische Techologien, Jena, D-07745, Germany
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- Wendt, Michael (författare)
- Instistut für Photonische Techologien, Jena, D-07745, Germany
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- Tompsic, Mikhael (författare)
- Hyper Tech research, Inc. 1275 Kinnear Road Columbus, OH 43212, USA
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- Tkach, Vasiliy (författare)
- Institute for Superhard Materials of the National Academy of Sciences of Ukraine, Kiev 04074, Ukraine
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- Danilenko, Nikolay (författare)
- Institute for Problems in Material Science of the Nationel Academy o Sciences of Ukraine, 3 Krzhizhanovsky Street, Kiev, 03680, Ukraine
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- Fesenko, Igor (författare)
- Institute for Superhard Materials of the National Academy of Sciences of Ukraine, Kiev 04074, Ukraine
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- Dub, Sergey N. (författare)
- Institute for Superhard Materials of the National Academy of Sciences of Ukraine, Kiev 04074, Ukraine
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- Moshchil, Vladimir (författare)
- Institute for Superhard Materials of the National Academy of Sciences of Ukraine, Kiev 04074, Ukraine
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- Sergienko, Nina (författare)
- Institute for Superhard Materials of the National Academy of Sciences of Ukraine, Kiev 04074, Ukraine
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- Schmidt, Christa (författare)
- Instistut für Photonische Techologien, Jena, D-07745, Germany
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- Litzkendorf, Doris (författare)
- Instistut für Photonische Techologien, Jena, D-07745, Germany
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- Nagorny, Peter (författare)
- Institute for Superhard Materials of the National Academy of Sciences of Ukraine, Kiev 04074, Ukraine
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- Sverdun, Vladimir (författare)
- Institute for Superhard Materials of the National Academy of Sciences of Ukraine, Kiev 04074, Ukraine
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- Vajda, Istvan (författare)
- Budapest University of Technology and Echonomics, Budapest, Hungary 1111 Budapest, Egry Jozsef u. 18. Hungary
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- Kósa, Janos (författare)
- Budapest University of Technology and Echonomics, Budapest, Hungary 1111 Budapest, Egry Jozsef u. 18. Hungary
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(creator_code:org_t)
- 2010
- 2010
- Engelska.
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Ingår i: Advances in Science and Technology. - 1662-0356. ; 75, s. 161-166
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.4...
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Abstract
Ämnesord
Stäng
- MgB2-based nanostructural materials with rather high oxygen concentration (5-14 wt.%) and dispersed grains of higher borides (MgB12, MgB7) high-pressure (2 GPa or 30 MPa) synthesized (in-situ) or sintered (ex-situ) demonstrated high superconducting characteristics (critical current density, jc, up to 1.8-1.0106 A/cm2 in the self magnetic field and 103 in 8 T field at 20 K, 3-1.5105 A/cm2 in the self field at 35 K, upper critical field up to HC2 = 15 T at 22 K, field of irreversibility Hirr =13 T at 20 K). The additives (Ti, SiC) and synthesis or sintering temperature can affect the segregation of oxygen and formation of oxygen-enriched Mg-B-O inclusions in the material structure, thus reducing the amount of oxygen in the material matrix as well as the formation of higher borides grains, which affects an increase of the critical current density. The record high HC2 and Hirr have been registered for the material high-pressure (2 GPa) synthesized from Mg and B at 600 oC having 17% porosity and more than 7 wt.% of oxygen. The attained values of the critical current, AC losses and thermal conductivity make the materials promising for application for fault current limiters and electromotors. The structural and superconducting (SC) characteristics of the material with matrix close to MgB12 in stoichiometry has been studied and the SC transition Tc=37 K as well as jc= 5×104 A/cm2 at 20 K in the self field were registered, its Raman spectrum demonstrated metal-like behavior.
Ämnesord
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
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- Physics
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Prikhna, Tetiana
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Gawalek, Wolfgan ...
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Savchuk, Yarosla ...
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Serga, Maxim
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Habisreuther, To ...
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Soldatov, Alexan ...
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visa fler...
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You, Shujie
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Eisterer, Michae ...
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Weber, Harald W.
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Noudem, Jacques
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Sokolovsky, Vlad ...
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Karau, Friedrich
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Dellith, Jan
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Wendt, Michael
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Tompsic, Mikhael
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Tkach, Vasiliy
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Danilenko, Nikol ...
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Fesenko, Igor
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Dub, Sergey N.
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Moshchil, Vladim ...
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Sergienko, Nina
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Schmidt, Christa
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Litzkendorf, Dor ...
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Nagorny, Peter
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Sverdun, Vladimi ...
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Vajda, Istvan
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Kósa, Janos
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