Abstract
AbstractIn this research, the effect of silver doping on Bi1.6Pb0.4Sr2Ca2Cu3Oy ceramic superconductor has been investigated. The solid‐state reaction method and two different silver doping methods has been used, namely, doping during making processes of samples (batch 1) and doping after making Bi1.6Pb0.4Sr2Ca2Cu3Oy superconductor (batch 2). We observed that by adding silver to BPSCCO compound, partial melting temperature of the compound is decreased. The critical current density (Jc) in both batches is affected by Ag doping. The investigation of SEM images of samples has shown that the all surfaces of the samples are porous and the grains are plate like. It seems that the BPSCCO grains in batch 1 samples are coated with silver but in the samples of batch 2, the silver also sits between the BPSCCO grains. The XRD patterns studies indicated that the silver peaks form separate phase and also by adding silver to BSCCO, the BPSCCO peaks do not show considerable shift. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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