Yttria stabilized zirconia solid electrolyte surface modification with ZrO_2, Y_2O_3, and ZrO_2 + 9 mol % Y_2O_3 films

摘要

The surface of ceramic electrolyte ZrO_2 + 9 mol % Y _2O_3, hereinafter referred to as YSZ (abbreviated yttria stabilized zirconia), was modified with 0.1 to 0.2 μm oxide films of ZrO _2, Y_2O_3, and YSZ (same composition as substrate) by dip coating in alcohol solutions of the relevant salts and further annealing. The results of scanning electronic microscopy and X-ray diffraction evidence epitaxial film growth. By means of impedance spectroscopy at the temperatures of 500 to 600°C, the effect of YZS electrolyte surface modification with ZrO_2, Y_2O_3, and YSZ films to the polarization resistance of silver electrode was studied.