Monofilamentary tapes (150 µm thickness) were prepared by swaging and rolling silver tubes containing the Bi:2212 ceramic (granulation below 20 µm) and the silver powder (grain size about 0.8 µm). The study has been made, among other samples, on tapes with nominal proportions of 0, 10 and 20wt% of silver. The samples were characterized by SEM, and by electrical measurements under varying applied magnetic field. The measurements of Jc showed that the addition of 10wt% silver powder enhances this property, doubling the obtained values at 60 K, while the 20wt% tape presented very low Jc. The tape with no silver content has a Jc as high as 2.2x105 A/cm2, at 4.2 K and zero applied magnetic field.
