Ba₂HfO₄ is a barium hafnate ceramic compound belonging to the rare-earth and refractory oxide family, characterized by a perovskite-related crystal structure. This material is primarily investigated in research contexts for high-temperature applications and specialized electronic devices, where its chemical stability and thermal properties are leveraged. While not yet widely commercialized, hafnate ceramics like this compound are of interest for advanced aerospace thermal protection, nuclear fuel cladding alternatives, and high-k dielectric applications where conventional oxides reach performance limits.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)2 entries | 109.9 | GPa | — | ||
| ↳ | 118.7 | GPa | — | ||
Poisson's Ratio(ν) | 0.2700 | - | — | ||
Shear Modulus(G)2 entries | 59.77 | GPa | — | ||
| ↳ | 65.01 | GPa | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 7.247 | kg/m³ | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg) | 3.476 | eV | — | ||
Dielectric Constant (Relative Permittivity)(εr)2 entries | 29.14 | - | — | ||
| ↳ | 18.22 range 4.423–32.02median of 2 measurements | - | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Piezoelectric Modulus(eij) | 0.000 | C/m² | — | ||
Seebeck Coefficient(S) | -164 | µV/K | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.000 | eV/atom | — | ||
Formation Energy(ΔHf) | -3.412 | eV/atom | — |