LaB6 — Properties & Data | MatWorld

LaB6

Name: LaB6
Brand: MatWorld

ceramic

· LaB6

Lanthanum hexaboride (LaB6) is a refractory ceramic compound that serves as a high-performance thermionic electron emitter. It is widely used in electron microscopy, vacuum electronics, and high-energy physics applications where reliable, long-lived electron sources operating at elevated temperatures are essential. LaB6 is preferred over tungsten filaments in demanding environments because it offers superior electron emission efficiency, extended operational lifetime, and lower operating temperatures, making it the material of choice for scanning electron microscopes (SEMs), transmission electron microscopes (TEMs), and specialized vacuum devices.

electron microscope filamentsthermionic cathodesvacuum electronicsparticle acceleratorsX-ray tube cathodeshigh-temperature emission sources

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	4.717	kg/m³	DFT · OptB88vdW

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

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Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	4.100	eV	Measured
↳	0.000	eV	DFT · OptB88vdW
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	1.400e-7	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00000188	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-0.1400	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.5300	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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Method

Property	Value	Unit	Conditions
Energy Above Hull(ΔEhull)	0.000	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)2 entries	-0.5838	eV/atom	DFT · OptB88vdW
↳	-0.5928	eV/atom	Measured

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

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.

LaB6

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental