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Formation of MgB2 at low temperatures by reaction of Mg with B6Si

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Abstract:

Formation of MgB2 by reactions of Mg with B6Si and Mg with B were compared, the former also producing Mg2Si as a major product. Compared to the binary system, the ternary reactions for identical time and temperature were more complete at 750 °C and below, as indicated by higher diamagnetic shielding and larger x-ray diffraction peak intensities relative to those of Mg. MgB2 could be produced at temperatures as low as 450 °C by the ternary reaction. Analyses by electron microscopy, x-ray diffraction and of the upper critical field show that Si does not enter the MgB2 phase.

Document Type: Research Article

DOI: http://dx.doi.org/10.1088/0953-2048/17/7/020

Publication date: July 1, 2004

iop/sust/2004/00000017/00000007/art00020
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