Thermodynamic properties of Sr-doped LaMnO{sub 3} perovskite in the La-Sr-Mn-O system
- Resource Type
- Journal Article
- Authors
- Source
- Journal of the Electrochemical Society; 146; 8; Other Information: PBD: Aug 1999
- Subject
- 36 MATERIALS SCIENCE
30 DIRECT ENERGY CONVERSION THERMODYNAMIC PROPERTIES
STRONTIUM OXIDES
DOPED MATERIALS
LANTHANUM OXIDES
MANGANESE OXIDES
SOLID OXIDE FUEL CELLS
ELECTRODES
ELECTROLYTES
- Language
- English
- ISSN
- 0013-4651
Thermodynamic properties of Sr-doped perovskite-type lanthanum manganites (LSM) were generated by measuring the electromotive force (EMF) of test materials, using the solid galvanic cell technique. The cell consisted of an anode (SrO/SrF{sub 2}), an electrolyte (CaF{sub 2} or SrF{sub 2}) and a cathode (LSM/SrF{sub 2}). Two types of cells were tested in which type 1 used a CaF{sub 2} electrolyte and type 2 used a SrF{sub 2} electrolyte. The activity of SrO substituting into various LSM compositions was calculated using the measured EMF. The Sr content was varied from 0.16 to 0.6 mol, and the temperature of interest varied from 700 to 1000 C. It was found that the SrO activity decreased with increasing temperature (at fixed composition) and increased with increasing Sr content (at fixed temperature).