Synthesis of air-sinterable lanthanum chromite powders
Lanthanum chromites, used as current interconnections in solid oxide fuel cells (SOFCs), have high electrical conductivity and are chemically stable. However, they are difficult to fabricate under conditions compatible with other SOFC components. A novel powder synthesis technique, the glycine/nitrate process, has been developed that produces chromite powders that can be sintered to near-full density in air at 1823 K. This paper describes the glycine/nitrate process for the synthesis and fabrication of lanthanum chromites. The sintering behavior and properties of a series of glycine/nitrate-produced lanthanum chromites are discussed. Some of the materials produced by this method match the thermal expansion of the electrolyte and maintain high electrical conductivity. 16 refs., 10 figs.
- Research Organization:
- Pacific Northwest Lab., Richland, WA (USA)
- Sponsoring Organization:
- DOE/FE
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 5188592
- Report Number(s):
- PNL-SA-17010; CONF-8910107--7; ON: DE90004681
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
300503* -- Fuel Cells-- Materials
Components
& Auxiliaries
36 MATERIALS SCIENCE
360601 -- Other Materials-- Preparation & Manufacture
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
AMINO ACIDS
CARBOXYLIC ACIDS
CHALCOGENIDES
CHELATING AGENTS
CHROMIUM COMPOUNDS
CHROMIUM OXIDES
DIRECT ENERGY CONVERTERS
ELECTROCHEMICAL CELLS
FABRICATION
FUEL CELLS
GLYCINE
LANTHANUM COMPOUNDS
NITRATES
NITROGEN COMPOUNDS
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POWDERS
RARE EARTH COMPOUNDS
SINTERING
SOLID ELECTROLYTE FUEL CELLS
STRONTIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS