BISMUTH-TUNGSTEN-COBALT OXIDE-BASED AND BISMUTH- TUNGSTEN-NIOBIUM OXIDE-BASED SOLID SOLUTIONS FOR OXIDE ION CONDUCTOR, AND METHOD FOR PRODUCING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a bismuth-tungsten-cobalt oxide-based solid solution and bismuth-tungsten-niobium oxide-based solid solution, suitable as oxide ion conductors. SOLUTION: The bismuth-tungsten-cobalt oxide-based solid solution and the bismuth-tungsten-niobium oxide-based solid solution, for the oxide ion conductor have tetragonal crystal structures represented by the general formulas of Bi1-xWx-xyCoxyO1.5+1.5x-2xy (0.119=x=0.151, 0y=0.10), and Bi1-xWx-xzNbxzO1.5+1.5x-0.5xz (0.119=x=0.151, 0z=0.3) respectively.