CaB6

Name: CaB6
Brand: MatWorld

ceramic

· CaB6

Calcium hexaboride (CaB6) is a ceramic compound belonging to the rare-earth hexaboride family, characterized by exceptional hardness and thermal stability at elevated temperatures. It is primarily used in thermionic electron emitters, cathode materials for high-temperature vacuum devices, and specialized refractory applications where extreme thermal cycling resistance and low work function are required. CaB6 is notable for its superior performance in electron emission compared to traditional tungsten-based cathodes, making it the preferred choice in advanced electron microscopy, X-ray tubes, and plasma generation systems where reliability and long operational life are critical.

cathode materials for vacuum devicesthermionic electron emittersX-ray tube componentselectron microscopyhigh-temperature refractoriesplasma generation systems

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	22,103.8	ksi	DFT · OptB88vdW
Poisson's Ratio(ν)	0.2600	-	DFT · OptB88vdW
Shear Modulus(G)	16,020.9	ksi	DFT · OptB88vdW

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

Property	Value	Unit	Conditions	Source
Density(ρ)	0.08873	lb/in³	DFT · OptB88vdW

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

Filter by

Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)3 entries	4.500	eV	Measured
↳	0.04500	eV	DFT · OptB88vdW
↳	0.05900	eV	DFT · TBmBJ
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	8.909	-	DFT · OptB88vdW
↳	8.479	-	DFT · TBmBJ
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.000752	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00122	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-75.02	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	95.84	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	6.120	%	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)	-0.4498	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.

CaB6 — Properties & Data | MatWorld

CaB6

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental