Electrical Conductivity of Ytterbium Sesquioxide (<TEX>$Yb_2O_3$</TEX>)

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J. Korean Ceram. Soc. > Volume 18(1); 1981 > Article

Journal of the Korean Ceramic Society 1981;18(1): 23.

$Yb_2O_3$의 전기 전도도

강영환, 최재시¹, 윤기현¹

한국에너지연구소
¹연세대학교

Electrical Conductivity of Ytterbium Sesquioxide ($Yb_2O_3$)

ABSTRACT

The electrical conductivity of highly pure polycrystalline $Yb_2O_3$ has been measured from 650 to 105$0^{circ}C$ under oxygen pressure range of $10^{-5}$ to 102 torr. The conductivity dependence of oxygen pressure in the temperature region from 750 to 105$0^{circ}C$ is approximated by $sigma$ $alpha$ $Po_2^{1/5.3}$. This shows that the conduction mechanism is associated with doubly ionized metal vacancies. Fairly low activation energy and the lack of oxygen pressure dependence are found over the temperature range of 650 to 75$0^{circ}C$. The conduction mechanism can be explaned by not metal vacancies, but hopping oxygen ions in the oxide.