Hafnium silicate (HfSiO₄) is a ceramic compound combining hafnium oxide with silica, forming a dense refractory material with high thermal stability. It is primarily used in advanced aerospace, nuclear, and high-temperature thermal protection applications where exceptional resistance to oxidation and thermal cycling is required. HfSiO₄ competes favorably with zirconia and other refractory ceramics in extreme environments because of hafnium's high atomic number and strong bonding within the silicate lattice, making it particularly valuable for thermal barrier coatings, nuclear fuel cladding, and space vehicle heat shields.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K) | 232.4 | GPa | — | ||
Poisson's Ratio(ν) | 0.2900 | - | — | ||
Shear Modulus(G) | 120.3 | GPa | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 6.861 | kg/m³ | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg) | 5.447 | eV | — | ||
Dielectric Constant (Relative Permittivity)(εr) | 8.076 range 3.926–12.23median of 2 measurements | - | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Seebeck Coefficient(S) | -444.5 | µV/K | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.000 | eV/atom | — | ||
Formation Energy(ΔHf) | -3.399 | eV/atom | — |