HfB6

ceramic

· JVASP-36042· HfB6

Hafnium hexaboride (HfB₆) is an ultra-high-temperature ceramic compound belonging to the hexaboride family, characterized by exceptional hardness and thermal stability. It is primarily of research and specialized industrial interest for extreme-environment applications where conventional materials fail, including aerospace thermal protection, high-temperature electrodes, and refractory applications in metal processing. HfB₆ is notable for its combination of high melting point, electrical conductivity unusual for ceramics, and resistance to oxidation at elevated temperatures, making it a candidate material where alternatives like tungsten or traditional oxides cannot operate.

aerospace thermal protectionultra-high-temperature electrodesrefractory liningshypersonic vehicle componentshigh-temperature catalytic systemsresearch and development

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	0.2220	lb/in³	DFT · OptB88vdW

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Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)	0.000	eV	DFT · OptB88vdW
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.000172	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000159	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	5.360	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	5.140	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.

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Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.5270	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	0.09552	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.

HfB6 — Properties & Data | MatWorld

HfB6

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental