Abstract
(ZrO2)0.99-x(Sc2O3)x(Yb2O3)0.01 solid solutions crystals (x = 0.08–0.10) have been grown by directional crystallization of the melt in a cold crucible. Single-phase optically transparent single crystals were obtained only for the (ZrO2)0.90(Sc2O3)0.09(Yb2O3)0.01 composition. The phase composition, local structure and transport properties of the crystals have been studied using X-ray diffraction, Raman, optical and impedance spectroscopy. The dependence of the lattice parameters and the phase composition of (ZrO2)0.99-x(Sc2O3)x(Yb2O3)0.01 solid solutions on Sc2O3 content has been discussed. The (ZrO2)0.90(Sc2O3)0.09(Yb2O3)0.01 single-phase cubic single crystals had the maximum conductivity throughout the entire temperature range. It is shown that the high-temperature conductivity of the (ZrO2)0.90(Sc2O3)0.09(Yb2O3)0.01 single-phase cubic single crystals is close to the conductivity of the (ZrO2)0.90(Sc2O3)0.10 crystals. The results of studying the local structure of crystals by optical spectroscopy are presented.
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