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)

Conference · Tue Nov 01 00:00:00 EST 1994

OSTI ID:10109193

Weber, W J; Stevenson, J W; Armstrong, T R; Pederson, L R

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
• Resource Relation: Conference: Fall meeting of the Materials Research Society (MRS),Boston, MA (United States),28 Nov - 9 Dec 1994; Other Information: PBD: Nov 1994
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE
LANTHANUM OXIDES
ELECTROCHEMISTRY
STRONTIUM OXIDES
CALCIUM OXIDES
COBALT OXIDES
IRON OXIDES
ELECTRIC CONDUCTIVITY
IONIC CONDUCTIVITY
OXYGEN
DIFFUSION
THERMAL GRAVIMETRIC ANALYSIS
400400
360204
PHYSICAL PROPERTIES