HfO
ceramic· JVASP-118529· HfO
Hafnium oxide (HfO₂) is a refractory ceramic compound valued for its extremely high melting point and thermal stability, making it suitable for extreme-environment applications. It is widely used in aerospace thermal protection systems, nuclear fuel cladding, and high-temperature coatings, where its resistance to oxidation and chemical attack provides significant performance advantages over alternative ceramics. In semiconductor manufacturing, HfO₂ serves as a high-κ dielectric material in advanced gate oxides, enabling continued device scaling where traditional silicon dioxide becomes prohibitive.
thermal barrier coatingsnuclear fuel applicationsaerospace heat shieldssemiconductor gate dielectricsrefractory liningshigh-temperature crucibles
Compliance & Regulations
?Conflict Free?RoHS?REACH?TSCA?Prop 65
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K) | 28,627.5 | ksi | — | ||
Poisson's Ratio(ν) | 0.2900 | - | — | ||
Shear Modulus(G) | 14,131 | ksi | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 0.4342 | lb/in³ | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg) | 0.000 | eV | — | ||
Magnetic Moment(μB) | 0.000 | µB | — |
Verified Unverified Low confidence (<80%) Link to source
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.1938 | eV/atom | — | ||
Formation Energy(ΔHf) | -2.683 | 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.