Cerium dioxide (CeO2) is a ceramic oxide semiconductor material with a fluorite crystal structure, widely used as a catalyst, polishing compound, and functional coating in industrial applications. It is employed in automotive catalytic converters for emission control, glass polishing and precision optics manufacturing, solid oxide fuel cells (SOFCs), and as an oxygen-storage component in exhaust systems due to its unique ability to switch between Ce³⁺ and Ce⁴⁺ oxidation states. Engineers select CeO2 over alternatives because of its exceptional oxygen mobility at elevated temperatures, chemical stability, and effectiveness at lower operating costs compared to precious-metal-only catalysts, making it essential in emission reduction technologies and advanced energy conversion systems.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K) | 185.2 | GPa | — | ||
Poisson's Ratio(ν) | 0.2500 | - | — | ||
Shear Modulus(G) | 19.22 | GPa | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 7.836 | kg/m³ | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg)2 entries | 3.410 | eV | — | ||
| ↳ | 0.000 | eV | — | ||
Dielectric Constant (Relative Permittivity)(εr) | 28.26 | - | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Piezoelectric Modulus(eij) | 0.000 | C/m² | — | ||
Seebeck Coefficient(S) | -504.2 | µV/K | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.7303 | eV/atom | — | ||
Formation Energy(ΔHf)2 entries | -3.767 | eV/atom | — | ||
| ↳ | -2.955 | eV/atom | — |