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Title: Oxygen ion-conducting dense ceramic

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.sub..alpha. (Fe.sub.1-x Co.sub.x).sub..alpha.+.beta. O.sub..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.
Inventors:
 [1];  [2];  [3];  [4];  [2]
  1. (Hinsdale, IL)
  2. (Naperville, IL)
  3. (Lisle, IL)
  4. (Las Cruces, NM)
Issue Date:
OSTI Identifier:
870712
Assignee:
Amoco Corporation (Chicago, IL) ANL
Patent Number(s):
US 5580497
Research Org:
Argonne National Laboratory (ANL), Argonne, IL
Country of Publication:
United States
Language:
English
Subject:
oxygen; ion-conducting; dense; ceramic; preparation; structure; properties; mixed; metal; oxide; compositions; containing; strontium; cobalt; iron; described; crystalline; example; represented; sr; alpha; 1-x; beta; delta; range; 01; upward; 20; renders; compound; charge; neutral; composition; non-perovskite; oxides; membranes; exhibit; ionic; conductivity; selective; separation; oxygen-containing; gaseous; mixture; oxide compositions; perovskite structure; oxide composition; ionic conductivity; ceramic membranes; mixed metal; oxygen-containing gas; gaseous mixture; metal oxide; metal oxides; ceramic membrane; containing gas; compositions containing; dense ceramic; oxygen ion-conducting; oxygen-containing gaseous; oxygen separation; charge neutral; compositions contain; ion-conducting dense; crystalline mixed; containing gaseous; /252/204/429/501/

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