Chromium oxide (Cr₂O₃) is a ceramic semiconductor material belonging to the transition metal oxide family, known for its hardness, chemical stability, and refractory properties. It is widely used in protective coatings, abrasive applications, and pigments across aerospace, automotive, and manufacturing industries, where its resistance to oxidation and corrosion at elevated temperatures makes it valuable for thermal barriers and wear-resistant surfaces. Engineers select Cr₂O₃ over softer alternatives when durability in harsh chemical or thermal environments is critical, though its brittleness and processing complexity require careful design consideration.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)2 entries | 204.6 | GPa | — | ||
| ↳ | 203.3 | GPa | — | ||
Elastic Compliance Tensor(Sij) | Matrix (redacted) | 1/GPa | — | ||
Elastic Anisotropy(AU) | 0.1470 | - | — | ||
Elastic Stiffness Tensor(Cij) | Matrix (redacted) | Pa | — | ||
Poisson's Ratio(ν) | 0.2650 | - | — | ||
Shear Modulus(G)2 entries | 114.2 | GPa | — | ||
| ↳ | 112.8 | GPa | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 4.799 | kg/m³ | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg)3 entries | 3.400 | eV | — | ||
| ↳ | 0.000 | eV | — | ||
| ↳ | 0.5560 | eV | — | ||
Dielectric Constant (Relative Permittivity)(εr) | 11.05 | - | — | ||
Electronic Dielectric Tensor(ε∞) | Matrix (redacted) | - | — | ||
Total Dielectric Tensor(ε) | Matrix (redacted) | - | — | ||
Magnetic Moment(μB) | 1.200 | μB | — | ||
Seebeck Coefficient(S) | -343 | µV/K | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.08290 | eV/atom | — | ||
Formation Energy(ΔHf)3 entries | -1.636 | eV/atom | — | ||
| ↳ | -2.352 | eV/atom | — | ||
| ↳ | -2.023 | eV/atom | — |