A reactivity study in the Mg-B system reaching for an improved synthesis of pure MgB2

A reactivity study in the Mg-B system reaching for an improved synthesis of pure MgB2

The binary Mg-B system was studied with respect to the existing phases MgB2, MgB4, MgB7, and MgB12 and their transformations into each other. As a result of these studies, a new synthesis route is reported for MgB2 by reacting MgB4 and Mg with each other. The obtained MgB2 was characterized by Rietv...

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Veröffentlicht in:Physica. C, Superconductivity Superconductivity, 2006-04, Vol.436 (1), p.38-42
Hauptverfasser: SCHMITT, Ruth, GLASER, Jochen, WENZEL, Thomas, NICKEL, Klaus G, MEYER, H.-Jürgen
Format: Artikel
Sprache:eng
Schlagworte:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Cross-disciplinary physics: materials science
rheology
Cuprates superconductors (high tc and insulating parent compounds)
Exact sciences and technology
Materials science
Materials synthesis
materials processing
Physics
Superconductivity
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Zusammenfassung:The binary Mg-B system was studied with respect to the existing phases MgB2, MgB4, MgB7, and MgB12 and their transformations into each other. As a result of these studies, a new synthesis route is reported for MgB2 by reacting MgB4 and Mg with each other. The obtained MgB2 was characterized by Rietveld refinement of the powder XRD pattern (RBragg=3.56%, Rwp=10.6%), magnetic measurements, and by electron probe microanalysis (EPMA). With this new synthesis route, a better phase homogeneity is obtained when compared with MgB2 samples prepared from the elements.
ISSN:0921-4534
1873-2143
DOI:10.1016/j.physc.2006.01.004