THE CUBIC SCANDIA STABILIZED ZIRCONIA FOR ELECTROLYTE OF SOLID OXIDE FUEL CELLS, AND THE FABRICATION METHOD THE SAME

摘要

A cubic scandia stabilized zirconia for a solid oxide fuel cell electrolyte, and a method for preparing the cubic scandia stabilized zirconia are provided to improve mechanical stability and the resistance against thermal stress and to allow the cubic phase to be maintained stably even at a high temperature for a long time. A cubic scandia stabilized zirconia is a powder represented by (ZrO2)_(1-x-y) (Sc2O3)_x (MO)_y, wherein x is 0.1-0.12; y is 0.001-0.05; and a starting material MO is any one selected from MnO2, TiO2, NiO, CuO and Al2O3. Preferably the powder has an average diameter of 0.1-1 micrometers. The preparation method of the cubic scandia stabilized zirconia comprises the steps of a solid phase reaction using zirconia(ZrO2), scandia(Sc2O3), and any one metal oxide selected from MnO2, TiO2, NiO, CuO and Al2O3; and a liquid phase reaction using any one of zirconium nitrate and zirconium chloride, scandium nitrate, and any one metal nitrate selected from Mn, Ti, Ni, Cu and Al.