Hf4 Si4

semiconductor
· Hf4 Si4

Hf4Si4 is a hafnium-silicon intermetallic compound belonging to the refractory ceramic family, combining hafnium and silicon in a stoichiometric ratio. This material is primarily of research and development interest as a ultra-high-temperature ceramic, with potential applications in extreme thermal environments where conventional materials degrade; it represents part of a broader exploration into hafnium silicides as alternatives to traditional superalloys and carbon-carbon composites in aerospace and energy sectors. The material's appeal lies in its potential for superior thermal stability and oxidation resistance at temperatures approaching or exceeding 1000°C, though practical industrial deployment remains limited and material characterization is ongoing.

hypersonic vehicle structuresrocket nozzles and combustion chambersultra-high-temperature coatingsrefractory composite reinforcementthermal protection systemsadvanced research applications

Compliance & Regulations

?EAR?Conflict Free?RoHS?REACH?TSCA?Prop 65
Units:
siimperial
PropertyValueUnitConditionsSource
Band Gap(Eg)
—
eV——
Verified Unverified Low confidence (<80%) Link to source
PropertyValueUnitConditionsSource
Formation Energy(ΔHf)
—
eV/atom——
Verified Unverified Low confidence (<80%) Link to source

Regulatory Screening

Environmental

Export Control

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.