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Oxygen ion-conducting dense ceramic

Patent ·
OSTI ID:870712
 [1];  [2];  [3];  [4];  [2]
  1. Hinsdale, IL
  2. Naperville, IL
  3. Lisle, IL
  4. Las Cruces, NM
+ Show Author Affiliations

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.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL
Assignee:
Amoco Corporation (Chicago, IL)
Patent Number(s):
US 5580497
OSTI ID:
870712
Country of Publication:
United States
Language:
English

References (3)

X-Ray Characterization of 7SrO.5Fe2O3 journal January 1974
Crystallographic properties of and mössbauer effect in Sr4Fe6O13 journal January 1972
Structure of Sr4Fe6O13, a new perovskite-derivative in the SrFeO system journal February 1986

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Related Subjects

/252/204/429/501/
01
1-x
20
alpha
beta
ceramic
ceramic membrane
ceramic membranes
charge
charge neutral
cobalt
composition
compositions
compositions contain
compositions containing
compound
conductivity
containing
containing gas
containing gaseous
crystalline
crystalline mixed
delta
dense
dense ceramic
described
example
exhibit
gaseous
gaseous mixture
ion-conducting
ion-conducting dense
ionic
ionic conductivity
iron
membranes
metal
metal oxide
metal oxides
mixed
mixed metal
mixture
neutral
non-perovskite
oxide
oxide composition
oxide compositions
oxides
oxygen
oxygen ion-conducting
oxygen separation
oxygen-containing
oxygen-containing gas
oxygen-containing gaseous
perovskite structure
preparation
properties
range
renders
represented
selective
separation
sr
strontium
structure
upward