Published September 1986
| Version v1
Journal article
Grain-boundary effect in ceria doped with trivalent cations: I, electrical measurements
Creators
- 1. Henry Krumb School of Mines, Columbia Univ., New York, NY 10027
Description
The ''grain-boundary effect,'' which leads to a greatly reduced dc ionic conductivity due to the presence of a blocking layer in the vicinity of the grain boundaries, is studied in detail for ceria ceramics doped with various trivalent dopants (particularly Y/sup 3-/, Gd/sup 3+/, and La/sup 3+/). The effects of porosity, of sintering time, and of dopant size and dopant concentration are investigated. Finally, it is shown that the grain-boundary effect virtually disappears when nearly silicon-free starting materials are used
Additional details
Publishing Information
- Journal Title
- J. Am. Ceram. Soc.
- Journal Volume
- 69
- Journal Issue
- 9
- Series
- J. Am. Ceram. Soc.
- Journal Page Range
- 641-646
- ISSN
- 0002-7820
- CODEN
- JACTA
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 18068444
- Subject category
- S36: MATERIALS SCIENCE; S36: MATERIALS SCIENCE; S36: MATERIALS SCIENCE;
- Descriptors DEI
- CATIONS; CERAMICS; CERIUM OXIDES; CHEMICAL COMPOSITION; CRYSTAL DOPING; DIRECT CURRENT; DOPED MATERIALS; GADOLINIUM; GRAIN BOUNDARIES; IONIC CONDUCTIVITY; LANTHANUM; LAYERS; POROSITY; QUANTITY RATIO; SINTERING; SIZE; STRUCTURAL CHEMICAL ANALYSIS; TIME DEPENDENCE; VALENCE; YTTRIUM
- Descriptors DEC
- CERIUM COMPOUNDS; CHALCOGENIDES; CHARGED PARTICLES; CRYSTAL STRUCTURE; CURRENTS; ELECTRIC CONDUCTIVITY; ELECTRIC CURRENTS; ELECTRICAL PROPERTIES; ELEMENTS; FABRICATION; IONS; MATERIALS; METALS; MICROSTRUCTURE; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; RARE EARTHS; TRANSITION ELEMENTS