HoSi2

ceramic
· HoSi2

Holmium disilicide (HoSi₂) is an intermetallic ceramic compound belonging to the rare-earth disilicide family, characterized by a hexagonal crystal structure and metallic bonding characteristics unusual for ceramics. It is primarily of research and specialized industrial interest for high-temperature applications where thermal stability and oxidation resistance are critical, particularly in aerospace thermal protection systems, refractory coatings, and advanced composite matrices. Compared to conventional ceramics, rare-earth disilicides like HoSi₂ offer improved fracture toughness and thermal shock resistance at extreme temperatures, making them candidates for next-generation hypersonic vehicle components and furnace elements, though manufacturing and cost limit current widespread adoption.

aerospace thermal protectionhigh-temperature refractory coatingshypersonic vehicle structuresceramic matrix compositesfurnace liners and cruciblesoxidation-resistant coatings

Compliance & Regulations

?Conflict Free?RoHS?REACH?TSCA?Prop 65
Units:
siimperial
PropertyValueUnitConditionsSource
Bulk Modulus(K)
88.17
GPa—
Poisson's Ratio(ν)
0.3400
-—
Shear Modulus(G)
34.62
GPa—
Verified Unverified Low confidence (<80%) Link to source
PropertyValueUnitConditionsSource
Density(ρ)
6.342
kg/m³—
Verified Unverified Low confidence (<80%) Link to source
PropertyValueUnitConditionsSource
Band Gap(Eg)
0.000
eV—
Magnetic Moment(μB)
0.000
µB—
Seebeck Coefficient(S)
-9.390
µV/K—
Verified Unverified Low confidence (<80%) Link to source
PropertyValueUnitConditionsSource
Energy Above Hull(ΔEhull)
0.1017
eV/atom—
Formation Energy(ΔHf)2 entries
-0.6022
eV/atom—
↳
-0.4662
eV/atom—
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

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.