Effeet of Lu3+-doping on high-temperature electric and thermal transport properties of CdO

Cd1-xLuxO(x=0%, 0.1%, 0.5%, 0.75%, 1.0%, 1.25%, 1.5%, 2%) ceramics have been synthesized by the traditional solid phase sintering method; and the effects of Lu3+-doping on the electric and thermal transport properties of these samples are investigated. With the increase of Lu3+-doping concentration, the room temperature carrier concentration in Cd1-xLuxO increases while the mobility first increases and then decreases. In the measuring temperature range of 300 to 1000 K, the electric conductivity of Cd1-xLuxO exhibites a metallic conducting behavior, and both their electric conductivity and thermal conductivity increase with the Lu3+-doping concentration. The Seebeck coefficient S of Cd1-xLuxO is negative in the whole measuring temperature range, and the dependence of S on the carrier concentration can be describedby a free electron model.