Abstract
Up to 30 weight-percent silver has been added, in the form of silver peroxide, prior to the final sintering step in the preparation of the high- T c superconductor Bi 2Sr 2CaCu 2O 8. The sintered samples were characterized by optical microscopy and image analysis energy-dispersive X-ray analysis, and X-ray diffraction. Intergranular and intragranular critical current densities were measured by transport and magnetization techniques, respectively. Under the sintering conditions used, there is no evidence of silver inclusion in the lattice, nor of any effect on the stoichiometry due to the silver additions. The silver does have a large effect, though on the sample morphology, and, therefore, on the intergranular critical current density. However, only a modest variation of the intragranular critical current density is observed with added silver.
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