The accelerated formation of MgB2 phase with high critical current density by Cu and SiC multidoping during the low-temperature sintering process

Abstract

Combined with the thermal analysis and phase identification, it is found that during the low-temperature sintering process of the SiC-doped MgB2 samples, the Cu addition can improve both the reaction between Mg and B and the reaction between Mg and SiC and thus accelerate the formation of the MgB2 phase with effective C substitution for B. Accordingly, we successfully synthesize MgB2 bulks with excellent critical current density (Jc) by proper amount of Cu and SiC multidoping sintered at 575 °C for only 5 h.