| 摘要 |
The present invention relates to novel solid state mixed conductor membranes and their use for separating oxygen from oxygen-containing feeds at elevated temperatures. The membranes comprise a multicomponent metallic oxide of substantially cubic perovskite structure, stable in air over the temperature range of 25-950.degree.C, having no connected through porosity wherein the membrane is of a composition represented by the formula ¢A1-xA'x!¢Co1-y-zByB'z!O3-.delta., where A - Ca, Sr, Ba, and mixtures thereof; A' - La, Y, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Th, U, and mixtures thereof; B = Fe, Mn, Cr, V, Ti, and mixtures thereof; B' - Cu, Ni, and mixtures thereof; ?0.0001 ?0.0005 metals.
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