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KMID : 1059519870310060498
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Journal of the Korean Chemical Society
1987 Volume.31 No. 6 p.498 ~ p.502
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Electrical Conductivity of (ZrO2)x-(Tm2O3)y System
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Cho Eun-Kyung
Chung Won-Yang
Kim Keu-Hong
Cho Seung-Koo
Choi Jae-Shi
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Abstract
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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.
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KEYWORD
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