HoB4Ru

ceramic

· JVASP-39462· HoB4Ru

HoB4Ru is an experimental intermetallic ceramic compound combining holmium, boron, and ruthenium—a rare-earth boride with metallic ruthenium incorporation. This material belongs to the hexaboride family, known for extreme hardness and high-temperature stability, and remains primarily in research and development rather than established industrial production. The ruthenium addition to holmium boride may enhance electrical conductivity and thermal properties compared to conventional rare-earth borides, making it of interest for high-temperature structural or functional applications, though its engineering viability and scalability have not been widely demonstrated.

high-temperature ceramics researchrefractory materials developmentrare-earth boride compoundsexperimental aerospace materialsthermoelectric applications (potential)ultra-hard coating precursors (potential)

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	0.3050	lb/in³	DFT · OptB88vdW

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

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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	0.000356	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000371	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-11.46	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	-11.80	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)	0.000	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-0.6464	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.

HoB4Ru — Properties & Data | MatWorld

HoB4Ru

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental