SiB6 — Properties & Data | MatWorld

SiB6

ceramic

· JVASP-8134· SiB6

Silicon hexaboride (SiB6) is an advanced ceramic compound belonging to the boride family, characterized by its extremely high hardness and thermal stability. It is primarily investigated for ultra-hard cutting tools, abrasive applications, and high-temperature structural components where conventional ceramics reach performance limits. SiB6 is notable for combining hardness rivaling superhard materials with chemical inertness, making it of significant interest in the machining and wear-resistant component sectors, though it remains less commercialized than established alternatives like cubic boron nitride or tungsten carbide due to manufacturing complexity.

cutting tool insertsabrasive grits and coatingswear-resistant componentshigh-temperature ceramicsarmor and ballistic protectionprecision grinding wheels

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	21,745.5	ksi	DFT · OptB88vdW
Poisson's Ratio(ν)	0.4100	-	DFT · OptB88vdW
Shear Modulus(G)	10,141	ksi	DFT · OptB88vdW

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Property	Value	Unit	Conditions	Source
Density(ρ)	0.07858	lb/in³	DFT · OptB88vdW

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Filter by

Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	0.1500	eV	DFT · OptB88vdW
↳	0.1820	eV	DFT · TBmBJ
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	21.63	-	DFT · OptB88vdW
↳	19.33	-	DFT · TBmBJ
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.00187	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00339	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-165.6	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	182.8	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	5.840	%	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)	0.4526	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	0.4284	eV/atom	DFT · OptB88vdW

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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.

SiB6

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental