OXYGEN EXCESS TYPE METAL OXIDE, AND METHOD AND APPARATUS MAKING USE OF THE METAL OXIDE AND CERAMIC FOR OXYGEN STORAGE OR OXYGEN SELECTIVE MEMBRANE

摘要

An oxygen excess type metal oxide expressed with the following formula (1) and exhibiting high speed reversible oxygen diffusibility whereby a large amount of excess oxygen is diffused at a high speed and reversibly in a low temperature region:        AjBkCmDnO7+δ     (1)whereA: one or more trivalent rare earth ions and CaB: one or more alkaline earth metalsC, D: one or more oxygen tetra-coordinated cations among which at least one is a transition metal,where j0, k0, and, independently, m≥0, n≥0, and j+k+m+n=6, and 0δ≤1.5.