HIGHLY ION CONDUCTIVE ZIRCONIA ELECTROLYTE FOR SOLID OXIDE FUEL CELLS, HIGHLY ION CONDUCTIVE ZIRCONIA ELECTROLYTE SINTERED COMPACT, UNIT CELL FOR SOLID OXIDE FUEL CELLS, AND METHOD OF SYNTHESIZING HIGHLY ION CONDUCTIVE ZIRCONIA ELECTROLYTE FOR SOLID OXIDE FUEL CELLS

摘要

PROBLEM TO BE SOLVED: To provide a novel and improved highly ion conductive zirconia electrolyte which keeps an inherently high oxygen ion conductivity that a conventional Scandia stabilized zirconia electrolyte (11ScSZ) has, but is arranged so that the crystalline structure of Scandia stabilized zirconia is stabilized in a cubic crystal structure and consequently, brings about a solution to the problem of occurrence of phase transition, and enables the improvement of the decrease in an output density.SOLUTION: A highly ion conductive zirconia electrolyte for solid oxide fuel cells is stabilized by a scandium oxide dissolved therein. In the zirconia electrolyte, at least one kind oxide selected from gadolinium oxide, samarium oxide and ytterbium oxide, and a cerium oxide are substituted and dissolved.