A Novel Process to Produce Amorphous Nanosized Boron Useful for hbox MgB 2 Synthesis

In this paper, we report a new synthesis route to produce boron powders characterized as being amorphous and having very fine particle size. This route has been developed to improve the performances of superconducting hbox MgB 2 powders, which can be directly synthesized from this nanostructured bor...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2012-08, Vol.22 (4), p.6200606-6200606
Main Authors: Vignolo, Maurizio, Romano, Gennaro, Martinelli, Alberto, Bernini, Cristina, Siri, Antonio S
Format: Article
Language:English
Subjects:
Borides
Boron
Magnesium compounds
Nanostructure
Scanning electron microscopy
Superconducting tapes
Superconductivity
Synthesis
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Summary:In this paper, we report a new synthesis route to produce boron powders characterized as being amorphous and having very fine particle size. This route has been developed to improve the performances of superconducting hbox MgB 2 powders, which can be directly synthesized from this nanostructured boron precursor by following the ex-situ or the in-situ PIT method during manufacturing of tapes, wires, and cables. All the procedure steps are explained, and the chemical-physical characterization of the boron powder, using X-ray diffraction, scanning electron microscopy, and transmission electron microscopy techniques, is reported. Furthermore, a comparison with commercial boron is given. Preliminary results of the magnetic and electrical characterization, such as critical temperature T C and transport critical current density J C t , for the hbox MgB 2 tape are reported and compared with those for the tape prepared with commercial boron.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2012.2190510