ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 31, Number 6
JKCSEZ 31(6)
December 20, 1987 

Electrical conductivities of (ZrO2)x-(Tm2O3)y systems containing 1, 3 and 5mol% of ZrO2 have been measured as a function of temperature and of oxygen partial pressure at temperatures from 600 to 1,100℃ and oxygen partial pressures from 10-5 to 2 × 10-1 atm. 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 PO2 are different at two temperature regions, indicating σα PO21/5.3 and σα PO21/10.7 at high-and low-temperature regions, respectively. The defect of (ZrO2)x-(Tm2O3)y system is V'''Tm 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.