Process of solid state reaction between doped ceria and zirconia

Solid state reaction at an interface between doped zirconia and ceria has b een analyzed by X-ray diffraction and EDX. The solid state reaction between Y-doped ceria and Y-stabilized zirconia occurred on heating at 1300 degree sC or higher temperatures to form a single cubic fluorite Y-doped ceria-zir conia phase. The reaction proceeded by preferential migration of the Ce com ponent to the zirconia lattice. The reaction significantly lowered the elec trical conductivity. The reaction between Sm-doped ceria and Y-stabilized z irconia, on the other hand, proceeded by migration of every component equal ly, i.e. preferential migration of a specific component was hardly observed . (C) 2000 Elsevier Science B.V. All rights reserved.