Al2O3
ceramic· Al2O3
Alumina (Al₂O₃) is a versatile oxide ceramic prized for its excellent hardness, chemical inertness, and thermal stability. It is widely used in structural applications, wear-resistant components, and insulators across industries ranging from aerospace to consumer electronics, valued for its ability to withstand high temperatures and corrosive environments where traditional metals would fail.
Grinding media and abrasivesThermal insulators and refractoriesSemiconductor packaging and substratesBiomedical implantsEngine components and wear partsElectrical insulators
Compliance & Regulations
?ISO 10993?Conflict Free?RoHS?REACH?TSCA?Prop 65
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)3 entries | 33,695.3 | ksi | — | ||
| ↳ | 33,630.9 | ksi | — | ||
| ↳ | 18,173.2 | ksi | — | ||
Elastic Compliance Tensor(Sij) | Matrix (redacted) | 1/GPa | — | ||
Elastic Anisotropy(AU) | 0.1550 | - | — | ||
Elastic Stiffness Tensor(Cij) | Matrix (redacted) | ksi | — | ||
Poisson's Ratio(ν)2 entries | 0.2380 | - | — | ||
| ↳ | 0.2800 | - | — | ||
Shear Modulus(G)3 entries | 21,367 | ksi | — | ||
| ↳ | 21,306.8 | ksi | — | ||
| ↳ | 9,198.3 | 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 | |
|---|---|---|---|---|---|
Thermal Conductivity(k) | 21.96 | BTU/(hr·ft·°F) | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 0.1134 | lb/in³ | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg)2 entries | 0.000 | eV | — | ||
| ↳ | 4.737 | eV | — | ||
Dielectric Constant (Relative Permittivity)(εr)3 entries | 8.980 | - | — | ||
| ↳ | 11.97 | - | — | ||
| ↳ | 6.597 range 3.236–9.958median of 2 measurements | - | — | ||
Electronic Dielectric Tensor(ε∞) | Matrix (redacted) | - | — | ||
Total Dielectric Tensor(ε) | Matrix (redacted) | - | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Piezoelectric Modulus(eij)2 entries | 0.1799 | C/m² | — | ||
| ↳ | 0.000 | C/m² | — | ||
Piezoelectric Stress Tensor(eij) | Matrix (redacted) | C/m² | — | ||
Seebeck Coefficient(S) | -101.5 | 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) | 0.1055 | eV/atom | — | ||
Formation Energy(ΔHf)3 entries | -2.079 | eV/atom | — | ||
| ↳ | -3.458 | eV/atom | — | ||
| ↳ | -3.208 | 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
Safety & Biocompatibility
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.