Electrical Conductivity of $(ZrO_2)_x-(Tm_2O_3)_y$ System

Electrical conductivities of systems containing 1, 3 and 5mol% of have been measured as a function of temperature and of oxygen partial pressure at temperatures from 600 to 1,100C and oxygen partial pressures from to . Plots of log conductivity vs. 1/T are found to be linear and average activation energy is 1.51 eV. The electrical conductivity dependences on PO are different at two temperature regions, indicating and at high-and low-temperature regions, respectively. The defect of system is and an electron hole is suggested as a carrier at high temperature region. At low temperature region, a mixed ionic and hole conduction is reasonable.