Barium oxide (BaO) is an alkaline earth oxide ceramic compound with a simple rock-salt crystal structure, known for its high density and strong ionic bonding. It is primarily used in specialty ceramics, glass formulations, and as a precursor material in the production of advanced ceramics and electronic components. Engineers select BaO for applications requiring thermal stability, chemical inertness, and high-temperature performance, though its hygroscopic nature (tendency to absorb moisture) and reactivity with CO₂ require careful handling and storage in sealed environments.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)3 entries | 68.36 | GPa | — | ||
| ↳ | 68.36 | GPa | — | ||
| ↳ | 75.37 | GPa | — | ||
Elastic Compliance Tensor(Sij) | Matrix (redacted) | 1/GPa | — | ||
Elastic Anisotropy(AU) | 0.00774 | - | — | ||
Elastic Stiffness Tensor(Cij) | Matrix (redacted) | Pa | — | ||
Poisson's Ratio(ν)2 entries | 0.2668 | - | — | ||
| ↳ | 0.2700 | - | — | ||
Shear Modulus(G)3 entries | 37.75 | GPa | — | ||
| ↳ | 37.75 | GPa | — | ||
| ↳ | 40.78 | GPa | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 5.854 | kg/m³ | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg)2 entries | 4.800 | eV | — | ||
| ↳ | 2.048 | eV | — | ||
Dielectric Constant (Relative Permittivity)(εr)2 entries | 43.04 | - | — | ||
| ↳ | 43.85 range 4.325–83.38median of 2 measurements | - | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Piezoelectric Modulus(eij) | 0.000 | C/m² | — | ||
Seebeck Coefficient(S) | -239.3 | µV/K | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.02850 | eV/atom | — | ||
Formation Energy(ΔHf)2 entries | -2.840 | eV/atom | — | ||
| ↳ | -2.746 | eV/atom | — |