Abstract
Abstract Solid solutions in the ternary system ZrO 2 -CeO 2 -Y 2 O 3 , by virtue of their high-temperature stability and good electrical conductivity, have potential application in many advanced technologies such as the magnetohydrodynamic (MHD) generator. The investigations reported here include studies on the structure, electrical conductivity and oxygen ion transport number of solid solutions in the system 0·9{(ZrO 2 ) 1 − x -(CeO 2 ) x }-0·1(Y 2 O 3 ) in the temperature range 1000–1600 K in static air. It is found that electrical conduction proceeds by transport of oxygen ions through the network of oxygen vacancies in the lattice. The variation of conductivity with composition has been analysed in relation to the changes in lattice parameter and scattering of oxygen ions.
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