y ZrO2-Sc2O3 Solid Electrolytes Doped with Yb2O3 or Y2O3

摘要

The effects of the Y2O3 and Yb2O3 co-doping impurities on the transport characteristics and stabilization of the cubic phase in solid solutions based on ZrO2-Sc2O3 were compared. The crystals of the (ZrO2)(0.99 -x)(Sc2O3)(x)(Yb2O3)(0.01) and (ZrO2)(0.99 -x)(Sc2O3)(x)(Y2O3)(0.01) (x = 0.08-0.10) solid solutions were grown by directed crystallization of the melt in a cold container. The high-temperature cubic phase was stabilized at a total concentration of stabilizing oxides of 11 mol % for (ZrO2)(0.99 -x)(Sc2O3)(x)(Y2O3)(0.01) crystals and at 10 mol % for (ZrO2)(0.99 -x)(Sc2O3)(x)(Yb2O3)(0.01) crystals. At (9-10) mol % scandium oxide, the high-temperature conductivity of the crystals co-doped with ytterbium oxide was higher than in the case of the crystals co-doped with yttrium oxide. The (ZrO2)(0.9)(Sc2O3)(0.09)(Yb2O3)(0.01) crystals have maximum conductivity over the whole temperature range.