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- Samples with the nominal composition, Bi1.84Pb0.34Sr1.91Ca2.03Cu3.06O10+δ high Tc superconductors containing Ag as an additive were fabricated by a solid-state reaction method. Samples with Ag of 10 wt%, 30 wt%, and 50 wt% each were sintered at 860℃∼870 ℃ for 24 hours. The structural characteristics, the microstructures and the critical temperature with respect to the each samples were investigated by XRD, four-prove methode, SEM and EDS respectively. The Tczero of the sample with the 50 wt% Ag additive at the surface showed 94 K.