A Simple Sol-gel Synthesis of Superconducting MgB₂ Nanowires
Bulk quantities of superconducting MgB2 nanowires were successfully synthesized from magnesium halides and sodium borohydride precursors. This was done through a simple method utilizing room temperature sol-gel chemistry and pyrolysis under a diborane-N2 atmosphere. a precursor gel was obtained by mixing the magnesium bromide and sodium borohydride reagents in the presence of cetyltrimethylammonium bromide (CTAB). the powder X-ray diffraction pattern of the black product showed the presence of the MgB2 phase. the report obtained during scanning electron microscopy revealed that the product was predominantly nanowires. TEM images showed that the nanowires were solid, straight, and uniform in diameter along the length. the successful bulk preparation of MgB2 nanowires by simple sol-gel assisted methods made it possible to extrude and pyrolyze the gel in a continuous process to produce superconducting nanowire cables.
M. Nath and B. A. Parkinson, "A Simple Sol-gel Synthesis of Superconducting MgB₂ Nanowires," Advanced Materials, Wiley-VCH Verlag, Jan 2006.
The definitive version is available at http://dx.doi.org/10.1002/adma.200600122
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