Abstract
Bi-Sr-Ca-Cu-O system superconducting ceramics with the addition of various oxides such as PbO and Ag2O was prepared using ordinary sintering method and the degradation in moisture was discussed. The sample with the addition of 6-8 wt% of PbO showed superconductivity at 105 K. When the sample with the addition of PbO was aged at 95°C and 100% of humidity, the resistivity scarcely changed after aging until 2 hrs and it showed superconductivity at 105 K.
