Cr2O3 — Properties & Data | MatWorld

Cr2O3

Name: Cr2O3
Brand: MatWorld

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

Units:

si imperial

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Method

Property	Value	Unit	Conditions
Bulk Modulus(K)2 entries	203.3	GPa	DFT
↳	204.6	GPa	DFT · PBE
Elastic Compliance Tensor(Sij)	Matrix (redacted)	1/GPa	DFT · PBE
Elastic Anisotropy(AU)	0.1470	-	DFT · PBE
Elastic Stiffness Tensor(Cij)	Matrix (redacted)	Pa	DFT · PBE
Poisson's Ratio(ν)	0.2650	-	DFT · PBE
Shear Modulus(G)2 entries	112.8	GPa	DFT
↳	114.2	GPa	DFT · PBE

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, or test environment.

Verified Unverified Low confidence (<80%) Link to source

Property	Value	Unit	Conditions	Source
Density(ρ)	4.799	kg/m³	DFT · OptB88vdW

Verified Unverified Low confidence (<80%) Link to source

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Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)3 entries	3.400	eV	Measured
↳	0.000	eV	DFT · PBE
↳	0.7350	eV	DFT · OptB88vdW
Dielectric Constant (Relative Permittivity)(εr)	11.05	-	DFT · PBE
Electronic Dielectric Tensor(ε∞)	Matrix (redacted)	-	DFT · PBE
Total Dielectric Tensor(ε)	Matrix (redacted)	-	DFT · PBE
Magnetic Moment(μB)	1.200	μB	DFT
Thermoelectric Power Factor(PF)2 entries	0.00123	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000780	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-380.5	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	385.7	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C

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, or test environment.

Verified Unverified Low confidence (<80%) Link to source

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Method

Property	Value	Unit	Conditions
Energy Above Hull(ΔEhull)	0.08290	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)3 entries	-1.636	eV/atom	DFT
↳	-2.023	eV/atom	DFT · OptB88vdW
↳	-2.352	eV/atom	Measured

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, or test environment.

Verified Unverified Low confidence (<80%) Link to source

Reference data from cited sources. Not verified or certified by MatWorld Inc. Verify against the source before use in design. Terms: engineering data

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.

Cr2O3

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