Electrical properties of lanthanum chromite based ceramics in hydrogen and oxidizing atmospheres at high temperatures. Second quarterly report, January-March 1980
The immediate purpose of this work is to determine whether hydrogen has a deleterious effect on lanthanum chromite in solid oxide fuel cells. Westinghouse personnel have noted that the In/sub 2/O/sub 3/ electrode connection to the electronically conducting LaCrO/sub 3/-based intercell connectors becomes loose, possibly because of hydrogen reducing the In/sub 2/O/sub 3/ and forming a steam layer which mechanically separates the two materials. Another possibility, which Westinghouse is pursuing, is that oxygen diffusion through the lanthanum chromite is the origin of this problem. A longer-range potential side benefit of this work is a contribution to understanding of conduction mechanisms in lanthanum chromite based ceramics. Such understanding would likely benefit other energy-related programs, such as the coal-fired MHD program in which yttrium chromite is a possible electrode material. Procedures and results of measurements of Hall effect, electric conductivity, and hydrogen diffusion are described.
- Research Organization:
- Montana State Univ., Bozeman (USA). Dept. of Physics
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AS05-79ET15415
- OSTI ID:
- 5015760
- Report Number(s):
- DOE/ET/15415--T1
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
30 DIRECT ENERGY CONVERSION
300503* -- Fuel Cells-- Materials
Components
& Auxiliaries
36 MATERIALS SCIENCE
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CERAMICS
CHALCOGENIDES
CHROMIUM COMPOUNDS
CHROMIUM OXIDES
DIFFUSION
DIRECT ENERGY CONVERTERS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROCHEMICAL CELLS
ELECTROLYTES
ELEMENTS
FUEL CELLS
HALL EFFECT
HIGH TEMPERATURE
HIGH-TEMPERATURE FUEL CELLS
HYDROGEN
INDIUM COMPOUNDS
INDIUM OXIDES
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MECHANICAL VIBRATIONS
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SOLID ELECTROLYTES
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
300503* -- Fuel Cells-- Materials
Components
& Auxiliaries
36 MATERIALS SCIENCE
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CERAMICS
CHALCOGENIDES
CHROMIUM COMPOUNDS
CHROMIUM OXIDES
DIFFUSION
DIRECT ENERGY CONVERTERS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROCHEMICAL CELLS
ELECTROLYTES
ELEMENTS
FUEL CELLS
HALL EFFECT
HIGH TEMPERATURE
HIGH-TEMPERATURE FUEL CELLS
HYDROGEN
INDIUM COMPOUNDS
INDIUM OXIDES
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MECHANICAL VIBRATIONS
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SOLID ELECTROLYTES
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS