Optimization of intergrain connection in high-temperature superconductor Bi2Sr2CaCu2O x*
Li Cheng-Shan, Zhang Sheng-Nan†, Hao Qing-Bin, Ma Xiao-Bo, Lu Tian-Ni, Zhang Ping-Xiang
       
Temperature dependence of the AC susceptibility for Bi-2212 bulks fabricated by (a) CP + sintering, (b) SPS, and (c) modified SPS processes. The AC fields of 0.1 Oe, 0.5 Oe, 1.0 Oe, and 1.5 Oe at frequency 333 Hz are used. (d) The peak temperature T p varies with the AC field.