734624
Cerium(IV) oxide-samarium doped
<0.5 μm particle size, powder, contains 20 mol % samarium as dopant
Synonym(s):
SDC-20, SDC, Samarium-doped ceria
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About This Item
Empirical Formula (Hill Notation):
CeO2
Molecular Weight:
172.11
MDL number:
UNSPSC Code:
26111700
PubChem Substance ID:
NACRES:
NA.23
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form
powder
Quality Level
contains
20 mol % samarium as dopant
composition
Sm0.2Ce0.8O1.9
greener alternative product characteristics
Design for Energy Efficiency
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surface area
10-14 m2/g
particle size
0.1-0.5 μm (d50)
<0.5 μm
bulk density
1.787 g/mL
greener alternative category
, Enabling
SMILES string
[Sm].O=[Ce]=O
InChI
1S/Ce.2O.Sm
InChI key
AQGZISMLQKBRRO-UHFFFAOYSA-N
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General description
Cerium(IV) oxide-samarium doped powder (20% mol samarium doped) (SDC-20) is an electrolytic material with a high oxygen ion conductivity. Samarium ion acts as an aliovalent cation that can be incorporated into the host lattice to increase the oxygen vacancy concentration and improve the oxide ion conduction in cerium oxide. It can be synthesized by reverse strike co-precipitation technique.
Samarium doped ceria may be used as an electrolyte in solid oxide fuel cells (SOFCs). Electrical conductivity as a function of temperature of doped ceria was investigated in a study. Relation of dopant type, oxygen vacancy ordering and ionic conductivity was investigated by transmission electron microscopy and electron energy loss spectroscopy.
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Application
Cerium(IV) oxide-samarium doped can be used in the fabrication of solid oxide fuel cells (SOFCs), which can further be used as environmentally-friendly sources of alternative energy.
Storage Class Code
11 - Combustible Solids
WGK
WGK 2
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
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Physical chemistry chemical physics : PCCP, 11(38), 8580-8585 (2009-09-24)
We report a correlation between oxygen ionic conductivity and the enthalpy of formation of trivalent-doped ceria from the component binary oxides observed at relatively low temperatures (150-275 degrees C). The bulk conductivities of La-doped ceria samples identical to those previously
Oxygen vacancy ordering in heavily rare-earth-doped ceria.
Ou DR, et al.
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