STRUCTURAL AND ELECTROOPTICAL PROPERTIES OF CO-DOPED YTTRIA-STABILIZED ZIRCONIA

The behaviour of lattice parameter of ZrO2 + 12 mole % Y2O3 as a funct ion of cobaltic oxide addition (0.1-0.5 mass To Co2O3) allows to assum e the formation of two types of solid solutions, substitutional and in terstitial and their mutual coexistence at w > 0.3 mass % Co2O3 The cr ystallographic ordering of oxygen sublattice according to this structu ral model results in the maximum of electrical conductivity observed a t approximate to 0.1 mass % Co2O3 and the corresponding changes in the Raman spectra and in the shape of infrared modes.