Synthesis of Mg(B$_{1-x}$C$_x$)$_2$ Powders

R. H. T. Wilke; S. L. Bud'ko; P. C. Canfield; D. K. Finnemore; S. T. Hannahs

doi:10.1016/j.physc.2005.08.007

paper

Synthesis of Mg(B $_{1 - x}$ C $_{x}$ ) $_{2}$ Powders

arXiv:cond-mat/0507151 · doi:10.1016/j.physc.2005.08.007

Abstract

We have synthesized bulk Mg(B $_{1 - x}$ C $_{x}$ ) $_{2}$ from a mixture of elemental Mg, B, and the binary compound B $_{4}$ C. Carbon incorporation was dramatically improved by a two step reaction process at an elevated temperature of 1200 $^{o}$ C. This reaction process results in a solubility limit near x $\sim$ 0.07. We found that impurities in the starting B cause an additive suppression of T $_{c}$ . We combine these data with T $_{c}$ and H $_{c 2}$ (T=0) data from CVD wires as well as plasma spray synthesized powders and present a unifying H $_{c 2}$ and T $_{c}$ versus x plot.

Synthesis of Mg(B1−x​Cx​)2​ Powders

Abstract

Synthesis of Mg(B $_{1 - x}$ C $_{x}$ ) $_{2}$ Powders