Bulk MgB₂ superconductor with high critical current density synthesized by self-propagating high-temperature synthesis method

Pure MgB_2 bulk samples are successfully synthesized by self-propagating high-temperature synthesis (SHS) method. The experiments show that the best preheating temperature is 250℃, the highest J_c values of the prepared MgB₂ reach 1.5×10⁶A/cm² (10K, 0.5T) and 1.7×10⁶A/cm² (20K, 0T), and the MgB₂ particle sizes range from 2 to 5\mum. The advantages of this method are that it is simple, economical and suitable for the manufacture of bulk MgB₂ materials on industrial scale.