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 characterized by being represented by the following formula (1) and at low-temperature zone, having the capability of high speed/reversible oxygen diffusion permitting the diffusion of large-amount excess oxygen at a high speed and in a reversible manner. A_jB_kC_mD_nO_7+d (1) wherein A: one or two or more members of trivalent rare earth elements and Ca, B: one or two or more members of alkaline earth metal elements, and C and D: one or two or more members of oxygen tetracoordinate elements, at least one thereof being a transition metal element, provided that j>0, k>0, that each independently, m=0, n=0, and that j+k+m+n = 6 and 0