Electrical conductivity of manganese doped yttria (8mol%) stabilized zirconia.

Abstract: Electrical conductivity of 10at.% manganese doped yttria (8mol%) stabilized zirconia (Mn-YSZ) has been investigated using electrochemical cell technique in 800–1000°C and 1–10−20 atm oxygen partial pressure range. The electrical conductivity increases according to power law with increasing in 1–10−5 atm range, remains independent in 10−5–10−15 atm range, and slightly decreases with decreasing in 10−15–10−20 atm range. The deviation from power law is attributed to the presence of multivalent state of manganese ions in 1–10−5 atm range. The electrical conductivity of Mn-YSZ is lower than that of yttria stabilized zirconia in reducing atmosphere. At lower oxygen partial pressures, lattice strain, defect association, and electron trapping results in decreased electrical conductivity. [Copyright &y& Elsevier]