| 摘要 |
Preparation, structure, and properties of mixed metal oxide compositions containing at least strontium, cobalt, iron and oxygen are described. The crystalline mixed metal oxide compositions of this invention have, for example, structure represented by Sr alpha (Fe1-xCox) alpha + beta O delta where x is a number in a range from 0.01 to about 1, alpha is a number in a range from about 1 to about 4, beta is a number in a range upward from 0 to about 20, and delta is a number which renders the compound charge neutral, and wherein the composition has a non-perovskite structure. Use of the mixed metal oxides in dense ceramic membranes which exhibit oxygen ionic conductivity and selective oxygen separation, are described as well as their use in separation of oxygen from an oxygen-containing gaseous mixture. |
