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.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)3 entries | 232.3 | GPa | — | ||
| ↳ | 231.9 | GPa | — | ||
| ↳ | 125.3 | GPa | — | ||
Elastic Compliance Tensor(Sij) | Matrix (redacted) | 1/GPa | — | ||
Elastic Anisotropy(AU) | 0.1550 | - | — | ||
Elastic Stiffness Tensor(Cij) | Matrix (redacted) | Pa | — | ||
Poisson's Ratio(ν)2 entries | 0.2380 | - | — | ||
| ↳ | 0.2800 | - | — | ||
Shear Modulus(G)3 entries | 147.3 | GPa | — | ||
| ↳ | 146.9 | GPa | — | ||
| ↳ | 63.42 | GPa | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Thermal Conductivity(k) | 38.00 | W/(m·K) | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 3.139 | kg/m³ | — |
| 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 | — |
| 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 | — |