HfB4Ir3

Name: HfB4Ir3
Brand: MatWorld

ceramic

· HfB4Ir3

HfB4Ir3 is an experimental hafnium–iridium boride ceramic compound combining the refractory properties of hafnium boride with iridium's high-temperature strength and oxidation resistance. This material exists primarily in research contexts as part of the ultra-high-temperature ceramic (UHTC) family, where it is being investigated for extreme thermal and mechanical environments that exceed the capabilities of conventional aerospace ceramics. Engineers would consider this compound for applications demanding exceptional performance at very high temperatures combined with chemical stability, though it remains a developmental material with limited commercial availability compared to established alternatives like hafnium carbide or zirconium diboride.

hypersonic vehicle leading edgesrocket nozzle insertsultra-high-temperature thermal protectionadvanced aerospace researchrefractory crucibles and linersresearch ceramics development

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	0.5365	lb/in³	DFT · OptB88vdW

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

Filter by

Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	0.000	eV	DFT · OptB88vdW
↳	0.000	eV	Measured
Thermoelectric Power Factor(PF)2 entries	0.0000329	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.0000466	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	1.637	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	-0.5267	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)	0.000	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-0.4913	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.

HfB4Ir3 — Properties & Data | MatWorld

HfB4Ir3

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental