Synthesis of Mg(B1−xCx)2 Powders
نویسندگان
چکیده
We have synthesized bulk Mg(B1−xCx)2 from a mixture of elemental Mg, B, and the binary compound B4C. Carbon incorporation was dramatically improved by a two step reaction process at an elevated temperature of 1200 C. This reaction process results in a solubility limit near x∼0.07. We found that impurities in the starting B cause an additive suppression of Tc. We combine these data with Tc and Hc2(T=0) data from CVD wires as well as plasma spray synthesized powders and present a unifying Hc2 and Tc versus x plot.
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