Abstract
In order to improve the electrical properties of stabilized Bi2O3 such as oxide-ion conductivity, conductivity degradation by annealing and reduction resistivity, the solid solution systems, (Bi0.8-xLnxEr0.2)2O3 (0.0 ≦ x ≦ 0.20) (Ln = La, Pr, Nd) were investigated. Though the electrical conductivity of the three solid-solution systems decreased with increasing x, the La-doped system showed the highest conductivity among these systems. In the (Bi0.8-xLaxEr0.2)2O3 system, (Bi07La0.1Er0.2)2O3 showed the best electrical properties, i.e., the high oxide-ion conductivity, the small degradation by aging and the high resistivity for reduction down to ∼10-14 Pa of oxygen partial pressure.
