Yttria (Y₂O₃) is a ceramic oxide compound and rare-earth material widely used as a high-performance refractory and optical ceramic. It is employed in thermal barrier coatings for aerospace turbines, solid-state laser hosts, optical windows for infrared applications, and as a stabilizing agent in zirconia-based ceramics for demanding thermal and chemical environments. Engineers select Y₂O₃ for its exceptional melting point, chemical inertness, and transparency in the infrared spectrum, making it irreplaceable in applications requiring thermal stability above 2000°C or specialized optical properties.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)3 entries | 19,976.8 | ksi | — | ||
| ↳ | 19,976.8 | ksi | — | ||
| ↳ | 22,013.8 | ksi | — | ||
Elastic Compliance Tensor(Sij) | Matrix (redacted) | 1/GPa | — | ||
Elastic Anisotropy(AU) | 0.1025 | - | — | ||
Elastic Stiffness Tensor(Cij) | Matrix (redacted) | ksi | — | ||
Poisson's Ratio(ν)2 entries | 0.3057 | - | — | ||
| ↳ | 0.3500 | - | — | ||
Shear Modulus(G)3 entries | 8,919.2 | ksi | — | ||
| ↳ | 8,919.2 | ksi | — | ||
| ↳ | 9,782.8 | ksi | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 0.1960 | lb/in³ | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg)3 entries | 5.600 | eV | — | ||
| ↳ | 1.751 | eV | — | ||
| ↳ | 2.867 | eV | — | ||
Dielectric Constant (Relative Permittivity)(εr) | 19.78 | - | — | ||
Magnetic Moment(μB)2 entries | 0.000 | μB | — | ||
| ↳ | 0.000 | µB | — | ||
Piezoelectric Modulus(eij) | 0.000 | C/m² | — | ||
Seebeck Coefficient(S) | -194.8 | µV/K | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.06730 | eV/atom | — | ||
Formation Energy(ΔHf)3 entries | -2.888 | eV/atom | — | ||
| ↳ | -3.949 | eV/atom | — | ||
| ↳ | -3.793 | eV/atom | — |