Cr2O3
semiconductor· Cr2O3
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.
thermal barrier coatingsabrasive grinding mediahigh-temperature corrosion protectionwear-resistant surfacespigments and colorantsrefractory linings
Compliance & Regulations
?EAR?Conflict Free?RoHS?REACH?TSCA?Prop 65
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)2 entries | 29,679.4 | ksi | — | ||
| ↳ | 29,486.9 | ksi | — | ||
Elastic Compliance Tensor(Sij) | Matrix (redacted) | 1/GPa | — | ||
Elastic Anisotropy(AU) | 0.1470 | - | — | ||
Elastic Stiffness Tensor(Cij) | Matrix (redacted) | ksi | — | ||
Poisson's Ratio(ν) | 0.2650 | - | — | ||
Shear Modulus(G)2 entries | 16,564.3 | ksi | — | ||
| ↳ | 16,364.9 | ksi | — |
N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form / heat treatment / basis.
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 0.1734 | lb/in³ | — |
Verified Unverified Low confidence (<80%) Link to source
| 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 | — |
N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form / heat treatment / basis.
Verified Unverified Low confidence (<80%) Link to source
| 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 | — |
N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form / heat treatment / basis.
Verified Unverified Low confidence (<80%) Link to source
Regulatory Screening
Environmental
Export Control
RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.