Abstract
The effect of the co-doped Yb2O3 on the transport characteristics and stabilization of the cubic phase in solid solutions based on ZrO2-Sc2O3 has been carried out. (ZrO2)1-x-y(Sc2O3)x(Yb2O3)y solid solution crystals, where (x=0.07-0.09; y=0.01-0.03), were grown by directional crystallization of the melt in a cold crucible. It is shown that crystals with a cubic fluorite structure were obtained at a total concentration of stabilizing oxides Sc2O3 and Yb2O3 above 10 mol%. At a fixed concentration of Sc2O3, crystals with a total concentration of stabilizing oxides of 10 mol.%, which have the structure of a pseudocubic t''-phase, have the maximum conductivity. Crystals with a total concentration of stabilizing oxides of 10 mol, having a pseudocubic t''-phase structure, at a fixed concentration of Sc2O3, have the maximum conductivity. It is shown that an increase in the Yb2O3 concentration in the field of cubic solid solutions leads to a decrease in the conductivity of the crystals. The (ZrO2)0.9(Sc2O3)0.09(Yb2O3)0.01 crystals have the maximum conductivity in the entire temperature range. Keywords: Crystal growth from melt, zirconium dioxide, solid electrolytes.
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