HoB2

ceramic

· HoB2

Holmium diboride (HoB₂) is a rare-earth metal boride ceramic compound that belongs to the hexaboride family of ultra-high-temperature ceramics. This material is primarily of research interest rather than established commercial production, valued for its potential in extreme thermal and chemical environments where conventional ceramics reach their limits. HoB₂ is notable among rare-earth borides for its refractory properties and potential applications in aerospace propulsion, nuclear systems, and high-temperature structural applications where thermal stability and resistance to oxidation are critical.

hypersonic vehicle componentsrocket nozzles and throatsnuclear reactor materialshigh-temperature cruciblesthermal protection systems

Compliance & Regulations

?Conflict Free?RoHS?REACH?TSCA?Prop 65

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	8.661	kg/m³	—

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Property	Value	Unit	Conditions
Band Gap(Eg)	0.000	eV	—
Magnetic Moment(μB)	0.000	µB	—
Seebeck Coefficient(S)	-4.717	µV/K	—

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Property	Value	Unit	Conditions
Energy Above Hull(ΔEhull)	0.000	eV/atom	—
Formation Energy(ΔHf)2 entries	-0.2892	eV/atom	—
↳	-0.6397	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, or test environment.

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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.

HoB2

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental