1 research outputs found
Formation of MgB2 at low temperatures by reaction of Mg with B6Si
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.Comment: Submitted to Supercond. Sci. Techno