Ba2HfO4
ceramic· Ba2HfO4
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.
high-temperature structural ceramicsrefractory coatingsnuclear fuel systemsadvanced dielectric materialsaerospace thermal protectionresearch/development phase materials
Compliance & Regulations
?Conflict Free?RoHS?REACH?TSCA?Prop 65
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)2 entries | 15,940.2 | ksi | — | ||
| ↳ | 17,221.8 | ksi | — | ||
Poisson's Ratio(ν) | 0.2700 | - | — | ||
Shear Modulus(G)2 entries | 8,668.4 | ksi | — | ||
| ↳ | 9,428.9 | 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 | |
|---|---|---|---|---|---|
Density(ρ) | 0.2618 | lb/in³ | — |
Verified Unverified Low confidence (<80%) Link to source
| 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 | — |
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) | 0.000 | eV/atom | — | ||
Formation Energy(ΔHf) | -3.412 | eV/atom | — |
Verified Unverified Low confidence (<80%) Link to source
Regulatory Screening
Environmental
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.