High-pressure synthesis of a bulk superconductive MgB2-based material

Prikhna, T. A.; Gawalek, W.; Savchuk, Ya. M.; Moshchil, Viktor; Sergienko, Nina; Surzhenko, A. B.; Wendt, Michael; Дуб, С. Н.; Melnikov, V. S.; Schmidt, Ch.; Nagorny, Peter

doi:10.1016/s0921-4534(02)02178-0

Cited by 31 publications

(39 citation statements)

References 2 publications

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“…In our previous study it has been shown that the addition of Ta in amount of 2 or 10 wt% to the starting mixture of Mg and B (taken in the stoichiometric ratio of MgB 2 ) leads to an increase of critical current density and irreversible field of high-pressure synthesized MgB 2 -based material Ref. [1]. We observed further improvement of the superconductive properties when Ti (10 wt%) was added to the starting Mg-B mixture instead of Ta.…”

Section: Introductionsupporting

confidence: 51%

High-pressure synthesis of MgB2 with addition of Ti

Prikhna¹,

Gawalek²,

Savchuk³

et al. 2004

Physica C: Superconductivity

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The MgB 2 -based material high-pressure synthesized at 2 GPa and 800 o C for 1 h from Mg and B (taken in the stoichiometry ratio of MgB 2 ) with addition of 2-10 wt% of Ti demonstrated the critical current density (j c ) higher than 100 kA/cm 2 at 33 K in 0 T field and at 20 K up to 3 T. At 20 K the critical current density higher than 10 kA/cm 2 was observed up to 5 T field. In the magnetic field up to 2 T high-pressure synthesized MgB 2 (with 10 % of Ti) at 20 K behaves in the same manner as Nb 3 Sn at 4.2 K.In XRD patterns of magnesium diboride with the Ti added, we observed no evidence of titanium diboride or unreacted titanium and only one compound with titanium was identified, namely, titanium dihydride TiH 2 (or more strictly TiH 1.924 ). The sample with the highest critical current density and irreversible field in the temperature range of 25-10 K contained some amount of pure Mg that was rather homogeneously dispersed in the material.The critical currents and irreversible fields of magnesium diboride synthesized at high pressure with Ti added are higher than those in the case where Ta has been added.

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Section: Introductionsupporting

confidence: 51%

High-pressure synthesis of MgB2 with addition of Ti

Prikhna¹,

Gawalek²,

Savchuk³

et al. 2004

Physica C: Superconductivity

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“…Bulk samples with a density reaching the theoretical density can be produced in this way [3]. The Ti-and Zr-doped MgB 2 samples were produced by a high pressure synthesis method [4] (2 GPa, 800 °C for 1 h with an addition of 10 wt. % Ti or Zr).…”

Section: Methodsmentioning

confidence: 99%

Ti and Zr doped MgB₂bulk superconductors

Hörhager

Eisterer

Weber

et al. 2006

J. Phys.: Conf. Ser.

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“…Promising results have been obtained by adding Ti, Zr, and SiC [19][20][21][22]. It was shown by us that addition of Ta positively influences superconductive properties of high-pressure synthesized and sintered MgB 2 [17]. The investigation of the Ti and Zr-doped high pressure-synthesized magnesium diboride has allowed us to reveal the mechanism of the Ti and Zr influence on superconductive properties absolutely different from the one proposed for magnesium diboride synthesized at ambient pressure.…”

Section: High Pressure-high Temperature Synthesis Of Highly Dense Nanmentioning

confidence: 96%

“…Usually a higher amount of Mg-B inclusions in the structure of high pressure-synthesized magnesium diboride corresponds to a higher critical current density and irreversibility field at 30-10 K, in the so-called range of working parameters for MgB 2 [16][17][18]. Samples, which are better from the point of view of SC characteristics, contain some amount of pure Mg and lesser amount of MgH 2 impurity or this phase is absent at all.…”

Section: High Pressure-high Temperature Synthesis Of Highly Dense Nanmentioning

confidence: 99%

Modern superconductive materials for electrical machines and devices working on the principle of levitation

Prikhna

2006

Low Temperature Physics

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The peculiarities of high-pressure synthesis of highly dense nanostructural MgB 2 -based superconductive materials, of thermobaric treatment of MT-YBCO (melt-textured YBa 2 Cu 3 O 7-dbased superconductor), high-pressure sintering of YBa 2 Cu 3 O 7-d , oxygenation of MT-YBCO under high isostatic pressure of oxygen and processes of formation of superconductive junctions between MT-YBCO blocks are considered. The attained level of superconductive and mechanical properties of such materials and junctions make them promising for application in cryogenic devices working on the principle of levitation: electricmotors, generators, pumps for liquid-gas transfer, magnetic bearings, flywheels, fault current limiters, maglev transport, etc. High-pressure synthesized MgB 2 (with Ti additions) blocks were for the first time tried in the superconductive electricmotor at 20 K and demonstrated an efficiency similar to MT-YBCO (at the same working temperature).

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High-pressure synthesis of a bulk superconductive MgB2-based material

Cited by 31 publications

References 2 publications

High-pressure synthesis of MgB2 with addition of Ti

High-pressure synthesis of MgB2 with addition of Ti

Ti and Zr doped MgB₂bulk superconductors

Modern superconductive materials for electrical machines and devices working on the principle of levitation

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High-pressure synthesis of a bulk superconductive MgB2-based material

Cited by 31 publications

References 2 publications

High-pressure synthesis of MgB2 with addition of Ti

High-pressure synthesis of MgB2 with addition of Ti

Ti and Zr doped MgB2bulk superconductors

Modern superconductive materials for electrical machines and devices working on the principle of levitation

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Product

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Ti and Zr doped MgB₂bulk superconductors