Processing and electrochemical properties of mixed conducting La{sub 1-x}A{sub x}Co{sub 1-y}Fe{sub y}O{sub 3-{delta}} (A=Sr, Ca)
Powder compositions in the series La{sub 1-x}A{sub x}Co{sub 1-y}Fe{sub y}O{sub 3-{delta}} (A = Sr, Ca) have been prepared by a combustion synthesis method. Sintering of pressed powders produced high-density test specimens with the perovskite structure. The specimens exhibited high electrical conductivities with appreciable oxygen-ion conductivity that increased with Co content for the compositions studied. Oxygen permeation studies showed a significant flux of oxygen that increased with temperature for specimens in a P(O{sub 2}) gradient with no applied field. Thermogravimetric studies of the La{sub 1-x}Sr{sub x}Co{sub 0.2}Fe{sub 0.8}O{sub 3-{delta}} system indicated a reversible mass loss with increasing temperature that increased with Sr content.
- Research Organization:
- Pacific Northwest Lab., Richland, WA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 10109193
- Report Number(s):
- PNL-SA--25465; CONF-941144--32; ON: DE95004910
- Country of Publication:
- United States
- Language:
- English
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