HfB — Properties & Data | MatWorld

HfB

Name: HfB
Brand: MatWorld

ceramic

· HfB

Hafnium boride (HfB₂) is an ultra-high-temperature ceramic compound belonging to the hexagonal boride family, characterized by exceptional thermal stability and refractory properties. It is used in extreme thermal environments such as rocket nozzles, hypersonic vehicle leading edges, and aerospace heat shields where materials must withstand temperatures exceeding 3000°C. Engineers select HfB₂ over conventional refractory ceramics like alumina or zirconia because of its superior thermal shock resistance, oxidation resistance at extreme temperatures, and maintained strength at ultra-high temperatures, making it critical for next-generation aerospace and defense applications.

rocket engine nozzleshypersonic vehicle componentsaerospace heat shieldsthermal protection systemsextreme refractory applicationsultra-high-temperature structural components

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	25,240.9	ksi	DFT · OptB88vdW
Poisson's Ratio(ν)	0.2900	-	DFT · OptB88vdW
Shear Modulus(G)	14,126.7	ksi	DFT · OptB88vdW

Verified Unverified Low confidence (<80%) Link to source

Property	Value	Unit	Conditions	Source
Density(ρ)	0.4012	lb/in³	DFT · OptB88vdW

Verified Unverified Low confidence (<80%) Link to source

Filter by

Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)3 entries	0.000	eV	Measured
↳	0.000	eV	DFT · OptB88vdW
↳	0.000	eV	DFT · TBmBJ
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.0000330	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.0000308	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	1.810	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	1.750	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C

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.

Verified Unverified Low confidence (<80%) Link to source

Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.2947	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-0.4605	eV/atom	DFT · OptB88vdW

Verified Unverified Low confidence (<80%) Link to source

Reference data from cited sources. Not verified or certified by MatWorld Inc. Verify against the source before use in design. Terms: engineering data

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.

HfB

Mechanical Properties

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Electrical Properties

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Regulatory Screening

Environmental