CuO-SrPbO3-Ag ceramic composites were synthesized at 1148 K in an oxyg
en ambient. The electrical conductivity of the composites strongly dep
ends on the oxygen pressure during the sintering process. Samples synt
hesized under oxygen pressures higher than 10 MPa show metal-like cond
uctivity due to the percolation channels formed by SrPbO3 and Ag.