YbB6 — Properties & Data | MatWorld

YbB6

ceramic

· JVASP-14705· YbB6

YbB6 is a rare-earth hexaboride ceramic compound composed of ytterbium and boron, belonging to the family of refractory hexaborides known for exceptional hardness and thermal stability. This material is primarily of research and specialized industrial interest, used in high-temperature applications such as thermionic electron emitters, cathodes in electron microscopes and vacuum devices, and as a refractory component in extreme thermal environments where conventional ceramics fail. Its selection is driven by superior electron emission properties and chemical inertness at elevated temperatures, making it valuable in analytical instrumentation and aerospace/defense thermal protection systems, though it remains less common than alternative rare-earth compounds due to processing complexity and cost.

electron microscope cathodesthermionic emittershigh-temperature refractoriesvacuum electronicsaerospace thermal applicationsanalytical instrumentation

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	22,665	ksi	DFT · OptB88vdW
Poisson's Ratio(ν)	0.2500	-	DFT · OptB88vdW
Shear Modulus(G)	16,775.1	ksi	DFT · OptB88vdW

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Property	Value	Unit	Conditions	Source
Density(ρ)	0.2046	lb/in³	DFT · OptB88vdW

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Filter by

Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	0.01300	eV	DFT · OptB88vdW
↳	0.1500	eV	DFT · TBmBJ
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	8.879	-	DFT · OptB88vdW
↳	8.091	-	DFT · TBmBJ
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.000453	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000718	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-49.22	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	62.68	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	6.190	%	DFT · TBmBJ

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)	-0.4976	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.

YbB6

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental