Effect of Yb_2O_3 stabilizing impurity on the structure and properties of (ZrO_2)_(0.9-x)(Sc_2O_3)_(0.1)(Yb_2O_3)_x crystals

摘要

The effect of introduction of 0.5 - 2 mol.% Yb_2O_3 additional doping oxide into ZrO_2 - 10 mol.% Sc_2O_3 solid solutions on the phase composition, structure and electrophysical properties has been studied. ZrO_2 stabilization due to the joint effect of 10 mol.% Sc_2O_3 and 2 mol.% Yb_2O_3 provides for the formation of transparent homogeneous crystals with a cubic structure having high phase stability. Mechanical grinding of the crystals has not changed their phase composition, the powders retaining the initial fluorite crystalline structure. We show that the high-temperature electrical conductivity of the crystals decreases with an increase in the Yb_2O_3 concentration.