Er4 Hf4 O14

semiconductor
· Er4 Hf4 O14

Er₄Hf₄O₁₄ is a rare-earth hafnium oxide ceramic compound belonging to the mixed rare-earth hafnate family, designed for high-temperature structural and functional applications. This material is primarily investigated in research contexts for thermal barrier coating (TBC) systems and advanced refractory applications where superior thermal stability, chemical inertness, and resistance to sintering are required compared to conventional yttria-stabilized zirconia (YSZ). The incorporation of erbium (a lanthanide) with hafnium oxide creates a thermally stable mixed-oxide phase that shows promise for next-generation aerospace engines and industrial high-heat environments where operating temperatures approach or exceed the limits of traditional coating materials.

thermal barrier coatingsaerospace engine componentshigh-temperature structural ceramicsrefractory materialsadvanced coating research

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.