Improvements in the MgB2 ceramics formation by using a dry mechanical milling method

The development of the MgB2 manufacturing process to increase current density is an important issue study. In this work, ceramics were manufactured by using solid-state technique. To study influence dry milling on formation and grain size, variations in ball powder weight ratio (BPR) sintering temperature used as control parameters. Magnesium boron with stoichiometric 2:1 was weighed milled for 2 h. compacted sintered at 1023 K 1123 By XRD SEM analysis, we confirmed that BPR increased magnesium reactivity refined size. phase 88.21% obtained sample BPR=2:1. determine critical MgB2, select smallest impurities measure its electrical property. onset (Tc-onset) selected 40.56 (?Tc = 0.4 K).